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1

COEFICIENTE DE RECURSOS PROPIOS Y FINANCIACIÓN DE LAS ENTIDADES BANCARIAS  

Microsoft Academic Search

El objetivo de este artículo es estudiar la fijación del cociente de capi- tal, esto es, el porcentaje que representan los recursos propios sobre el total de activos, por parte de las empresas bancarias. Para ello, se pro- pone un modelo teórico que analiza la existencia de un cociente de ca- pital objetivo distinguiendo dos regímenes: uno para las empresas

VÍCTOR E. BARRIOS; JUAN M. BLANCO

2

El Centro Resource Area: Summary of Programs.  

National Technical Information Service (NTIS)

The El Centro Resource Area is one of five Resource Area field offices within the California Desert District, whose boundaries make up the California Desert Conservation Area (CDCA). The CDCA was established by Congress through passage of the Federal Land...

1990-01-01

3

Centro para la Salud Mundial del NCI  

Cancer.gov

El Centro para la Salud Mundial del NCI coordina actividades de investigación y trabaja con socios nacionales e internacionales para entender y enfrentar la carga que representa el cáncer a nivel mundial.

4

Airfield Pavement Evaluation - Usnaf El Centro, California.  

National Technical Information Service (NTIS)

The evaluation of the pavement at the U. S. Naval Air Facility, El Centro, California, is presented with the allowable gross load capacities of the runways, taxiways, and parking aprons for single, dual, single-tandem, and dual-tandem wheel assembly aircr...

R. J. Lowe W. H. Chamberlin

1966-01-01

5

Medicina integrativa en Am?rica: De qu? forma se est? practicando la medicina integrativa en los centros cl?nicos en los Estados Unidos  

PubMed Central

RESUMEN EJECUTIVO El impulso para desarrollar e implementar estrategias de medicina integrativa está enraizado en el deseo de mejorar la atención al paciente. The Bravewell Collaborative, una organización sin ánimo de lucro dedicada a la mejora de la atención sanitaria, define la medicina integrativa como “un enfoque de la medicina que coloca al paciente en el centro y se dirige al conjunto completo de influencias físicas, emocionales, mentales, sociales, espirituales y ambientales que afectan a la salud de la persona. Con una estrategia personalizada que considera las condiciones, necesidades y circunstancias únicas del paciente, utiliza las intervenciones más apropiadas de una variedad de disciplinas científicas para curar la afección y la enfermedad y ayudar a las personas a recobrar y mantener una salud óptima”. En las pasadas dos décadas, se ha documentado un número creciente de centros clínicos que proporcionan medicina integrativa, el número de facultades y escuelas médicas que enseñan estrategias integrativas, el número de investigadores que estudian intervenciones integrativas, y el número de pacientes que solicitan cuidados integrativos. Pero se desconocía si la medicina integrativa se estaba ofreciendo de manera igual, similar, o dispar. Además, mientras que los estudios anteriores se centraban en la prevalencia y el uso de la medicina complementaria o alternativa (MCA) por parte de los pacientes1,2 o de los médicos en hospitales3, enumerando la utilización de terapias MCA individuales, se había recogido muy poca información con respecto a la práctica real de la medicina integrativa que, por definición, trata a la persona en su conjunto. En 2011, The Bravewell Collaborative encargó una encuesta para determinar la forma en que la medicina integrativa se estaba practicando en los Estados Unidos: (1) describiendo las poblaciones de pacientes y las afecciones sanitarias tratadas más habitualmente; (2) definiendo las prácticas y modelos fundamentales de atención; (3) determinando cómo se reembolsaban los servicios; (4) identificando los valores y los principios subyacentes a la atención; y (5) determinando los factores principales que impulsan una implementación satisfactoria.

Horrigan, Bonnie; Lewis, Sheldon; Abrams, Donald I.; Pechura, Constance

2012-01-01

6

Evaluation of Efforts to Strengthen Police-Resident Relations in El Centro, California. Final Report.  

National Technical Information Service (NTIS)

In 1996, the El Centro Police Department (ECPD) formed a research partnership with San Diego State University to study ways of improving police-resident relations throughout El Centros neighborhoods. The study was prompted by the ECPDs decision to impleme...

M. J. Sabath H. Carter

2000-01-01

7

Evaluation of Naf El Centro Using Layered Theory.  

National Technical Information Service (NTIS)

The techniques of the layered pavement method for the design of flexible pavements have been used to evaluate the flexible pavements at the U. S. Naval Air Facility, El Centro, California. This evaluation has provided in-situ moduli of elasticity for all ...

J. P. Nielsen

1967-01-01

8

El Centro College Strategic Plan, 2000-2005.  

ERIC Educational Resources Information Center

This is the 2000-2005 strategic plan at El Centro College (Texas). It discusses the college's mission, vision, and core values, and provides information on goals and success indicators. Goals include: (1) preparing students for careers and for transfer to four-year institutions; (2) providing quality continuing/workforce education to enrich…

El Centro Coll., Dallas, TX.

9

Desarrollo de una Interfaz de Control para un Observatorio Astronómico Robotizado con fines educativos en la Facultad de Ciencias Exactas; Físicas y Naturales de la UNSJ  

NASA Astrophysics Data System (ADS)

We report the development and the construction of an Interface to Control a robotized Astronomical Observatory (ICOA), which allows to control the operation of an observatory based on a Meade LX200 telescope. The interface operates together with a computer to control and supervise all the local variables of the observatory, and can take the control of it in risky situations. It serves as a link among the control computer and all the necessary devices for the astronomical observation such as the telescope, the dome, the weather station, the CCD camera, the calibration devices and the security devices. The computer receives orders from an operator who can be or not at the site of observation. The goal of this robotized observatory is the operation in a secure, autonomous and unattended way, with the purpose of to be used remotely by the students of the "Facultad de Ciencias Exactas, Físicas y Naturales" of the UNSJ. FULL TEXT IN SPANISH

Pogrebinsky, L.; Francile, C.

10

Narrative Report of the El Centro de la Causa Library Project, 1973-1975.  

ERIC Educational Resources Information Center

El Centro de la Causa and the Chicago Public Library cooperated in a program to serve Chicago's Spanish speaking population. The project assessed needs and designed programs to meet those needs by establishing a library in El Centro's community center and some outreach programs. An active acquisitions program for Spanish language materials was…

Chicago Public Library, IL.

11

Magda Mateus Cardenas, director of Centro Amauta, Cusco, Peru: interview.  

PubMed

Magda Mateus Cardenas, trained as an anthropologist, is currently director of Centro Amauta, a feminist organization in Peru that addresses issues of gender, class, and culture. In this interview, Mateus Cardenas describes her long involvement with development organizations and grass-roots campaigns to improve women's status. She notes that, although many organizations have adopted a gender perspective, few comprehend its highly political, transformational aspects. Women's rights tend to be viewed by development agencies as just one more factor to be incorporated into development projects rather than as a perspective that changes views of development itself. A genuine gender perspective entails changes in the organizational, social, and political aspects of the themes of autonomy and empowerment, with adaptations of content and methods to local conditions. A precondition to women's emancipation is access to and control of financial and economic resources. This, in turn, requires training in technical skills and access to the marketplace on more competitive terms. PMID:12320745

Sweetman, C

1997-02-01

12

BECA (Bilingual Education Centro de Accion) Program Handbook for Student Teachers and Supervisory Personnel.  

ERIC Educational Resources Information Center

This manual is a reference guide for both student teachers and supervisory personnel involved with the Texas Woman's University Bilingual Education "Centro de Accion" (BECA) Program. The BECA program includes the following components in addition to the fulltime BECA undergraduate program: para-professional training program, graduate programs for…

Reyes, Maria; And Others

13

Student Attendance Policies at El Centro College: Their Rationales and Results.  

ERIC Educational Resources Information Center

In 1976 El Centro College tightened its attendance policies--the bases for dropping students for excessive absences. Though operated under a common administrative system, each program, division, or individual instructor set up whatever policy seemed most appropriate. A faculty questionnaire examined the newly developed attendance policies and a…

Kelso, Genell

14

Adult Basic Education Project, El Centro Hispano. Annual Report 1969-70.  

ERIC Educational Resources Information Center

This yearly report of El Centro Hispano Adult Basic Education Project in Milwaukee discusses student successes and accomplishments, innovative projects, cooperation with agencies, teacher education activities, major problems, and instructional materials. Appended are a list of staff, statistical reports, and reproductions of letters composed by…

Goodwin, Sara Hall

15

Indicators of Success in Achieving the El Centro College Goals, 1997-2000.  

ERIC Educational Resources Information Center

This is a report on indicators of success in achieving community college goals at El Centro College (Texas). The report provides statistics from 1997-2000 and focuses on the progress of nine goals: (1) institutionalizing service beyond expectation--according to student satisfaction surveys, campus changes that have occurred between 1996 and 1999…

El Centro Coll., Dallas, TX.

16

Bambini al Centro: Music as a Means to Promote Wellbeing. Birth and Configuration of an Experience  

ERIC Educational Resources Information Center

Bambini al Centro--literally "Children in the Centre"--is a project operating since 1999 in Rome, financed by the Italian State. It is a recreational-musical space devoted to children aged 0-12 months and their families. The principal goal of the Centre is to provide an opportunity for encounter, relationship, sharing and global growth with, and…

Iadeluca, Valentina; Sangiorgio, Andrea

2009-01-01

17

Design of a Heliostat for Centro de Investigaciones de Astronomía (CIDA)  

Microsoft Academic Search

This paper explains the procedure used in the design of a heliostat to be installed at the headquarters of the Centro de Investigaciones de Astronomía, located in the city of Mérida, Venezuela. The heliostat will be used mainly for educational and public outreach programs, so the design specifications did not require compensation for rotation of the Sun's image at the

L. E. Dávila; S. J. Barboza; G. A. Sánchez; F. Della Prugna; J. Cova; S. E. Provenzano; R. D. Chacón

2009-01-01

18

Trabajos de prospeccion preliminar para mineralizacion uranifera en el sector Centro Escolar. Provincia Pinar del Rio. (Prospection works for uranium mineralizations in the sector Centro Escolar. Province of Pinar del Rio).  

National Technical Information Service (NTIS)

This article shows the final results obtained from the prospection works, realized in a sector Centro Escolar. Those works were projected in order to search radioactive minerals' accumulations in some prospective areas. The main result was the selection o...

J. Alcaide Orpi B. Pena Fortes J. Olivera Acosta R. Leal Ramirez T. Geler Roffe

1996-01-01

19

Seguranca radiologica no uso de tecnicas nucleares -atividades desenvolvidas pelo Centro de Desenvolvimento da Tecnologia Nuclear - CNEN. (Radiological safety in the use of nuclear technique-activities developed by Centro de Desenvolvimento da Tecnologia Nuclear - CNEN).  

National Technical Information Service (NTIS)

The activities developed by the Centro de Desenvolvimento da Tecnologia Nuclear - CDTN supporting the users of nuclear techniques are described. The methodology used and future plans for the group are shown. (E.G.). (Atomindex citation 22:055424)

T. Wakabayashi E. G. Pereira T. Hirayama

1991-01-01

20

Incidence of neoplastic donors in Organizzazione Centro Sud Trapianti area during the 2003-2005 period.  

PubMed

The aim of this study is to evaluate the incidence of malignant tumors in cadaver donors and the possibility of neoplastic disease transmission to the recipients in the Organizzazione Centro Sud Trapianti (OCST) area. Among 1744 potential donors identified from 2003 to 2005, 125 (7.1%) showed an elevated malignant neoplastic risk. In 2003 a malignant tumor was diagnosed in 60 donors of mean age 59.6 +/- 19.9 years (median 62.5, M:36 F:24); in 2004, 33 donors of mean age, 61.4 +/- 15.9 years (median 63, M:19 F:14); in 2005, 32 donors of mean age of 62.8 +/- 15.5 years (median 65.5, M:20 F:12). Prostatic cancer was the most common tumor (23.2%). In 101 of 125 cases (80.8%) the tumor was diagnosed before organ retrieval, in 23 (18.4%) cases, during the donor operation but before the transplant, and in one case (0.8%) after transplantation. Each tumor was evaluated according to the histologic types and grades. From 12 of those donors with neoplasia, 24 organs were retrieved (10 livers, 11 kidneys, 3 hearts) transplanted in 23 recipients (one liver-kidney combined transplant). Three recipients died during the perisurgical period due to causes unrelated to the tumor and therefore were not considered in the follow-up evaluation. Among the remaining nine recipients who had a mean follow-up of 38.83 months (range 9-42), no donor-transmitted disease has become apparent by imaging control. A careful donor evaluation including histologic grading and strict application of Centro Nazionale Trapianti guidelines allowed us to use donors with malignant tumors in selected cases with an apparently reduced risk of transmitted neoplastic disease. PMID:17692602

Pretagostini, R; Peritore, D; Fiaschetti, P; Stabile, D; Santaniello, W; Maiello, C; Rizzato, L; Oliveti, A; Grigioni, W

2007-01-01

21

An Evaluation of the El Centro de la Causa Library and Information Center: August 1973 through July 1974. Final Report.  

ERIC Educational Resources Information Center

An evaluation of Chicago's El Centro de la Causa Library and Information Center was undertaken by the University of Illinois Library Research Center in 1974. Evaluation methods included: (1) a survey of user and nonuser characteristics and attitudes concerning library services; (2) a survey of the needs and information-seeking behavior of people…

Michael, Mary Ellen; Encarnacion, Leticia

22

Centro-median stimulation yields additional seizure frequency and attention improvement in patients previously submitted to callosotomy  

Microsoft Academic Search

RationaleDeep brain stimulation (DBS) has been increasingly used in the treatment of refractory epilepsy over the last decade. We report on the outcome after thalamic centro-median (CM) DBS in patients with generalized epilepsy who had been previously treated with extended callosal section.

Arthur Cukiert; Jose Augusto Burattini; Cristine Mella Cukiert; Meire Argentoni-Baldochi; Carla Baise-Zung; Cássio Roberto Forster; Valeria Antakli Mello

2009-01-01

23

Shallow shear wave velocity and Q structures at the El Centro strong motion accelerograph array  

NASA Astrophysics Data System (ADS)

At three sites in the U.S. Geological Survey El Centro Strong Motion Accelerograph Array (EO5, EO6 and EO7), we have used the dispersive and attenuative properties of artificially generated Rayleigh waves to infer the depth dependence of shear wave velocity (?) and quality factor (Q) and a site dependent equivalent elastic source spectrum. This approach provides an inexpensive means for determining two important quantities (? and Q) required to estimate the response of sites to earthquakes. We find that the shear velocities and the gradients in shear velocities down to depths of 100 meters at station EO6 (in the wedge between the Imperial and Brawley faults) are nearly twice those at either station EO5 and EO7 (east and west, respectively, of the wedge). Also, the seismogram character, surface wave dispersion and shear wave velocity structure at stations EO5 and EO7 are similar to each other while they are different from EO6. These results show significant structural differences between the wedge beneath EO6 and surrounding areas. The anomalously high accelerations recorded at EO6 during the 1979 Imperial Valley earthquake may be related to these differences.

Barker, Terrance G.; Stevens, Jeffry L.

1983-09-01

24

Deaths on board ships assisted by the Centro Internazionale Radio Medico in the last 25 years.  

PubMed

Data on occupational diseases of seafarers and of causes of death during their career are sparse. The causes of deaths on board ships assisted by Centro Internazionale Radio Medico (CIRM), the Italian Telemedical Maritime Assistance Service (TMAS) were reviewed by examining 29,146 files of patients treated from 1986 to 2010. In the 25 years, 383 deaths occurred (1.31%). Diseases of the circulation were the most frequent, followed by external causes such as accidents and violence, infectious and parasitic diseases, alcohol and drug addiction, respiratory system diseases. Cardiovascular and external causes were the principal causes of deaths among seafarers. This investigation is the first study on the causes of death on board ships obtained from data of a maritime telemedical centre, that has assisted seafarers when they were alive or immediately after their death. The fact that diseases of the circulatory system are the first cause of death of sailing seafarers deserves specific initiatives. They should include campaigns for adequate lifestyles and the availability on ships of medical devices useful for diagnostic purposes, resuscitation as well as for verification of death. PMID:22819258

Grappasonni, Iolanda; Petrelli, Fabio; Amenta, Francesco

2012-07-01

25

Design of a Heliostat for Centro de Investigaciones de Astronomía (CIDA)  

NASA Astrophysics Data System (ADS)

This paper explains the procedure used in the design of a heliostat to be installed at the headquarters of the Centro de Investigaciones de Astronomía, located in the city of Mérida, Venezuela. The heliostat will be used mainly for educational and public outreach programs, so the design specifications did not require compensation for rotation of the Sun's image at the focal point. The engineering computational tools CAD-CAE were used in order to allow a seamless interaction between the two disciplines involved, Mechanical Engineering and Astronomy. It has also been taken into consideration, as a starting requirement, that all materials be easily available and that all parts, excluding the optics, could be manufactured with the equipment available at the CIDA workshop. These considerations were intended to reduce the cost of the device and to increase the feasibility of construction with limited technological facilities and financial resources. The results obtained by means of the computing tools used were validated through comparison against the analytical calculations. As a result, a robust but low cost heliostat was designed which in the near future will be used to project the Sun's image on a screen for public viewing and student research projects.

Dávila, L. E.; Barboza, S. J.; Sánchez, G. A.; Della Prugna, F.; Cova, J.; Provenzano, S. E.; Chacón, R. D.

2009-05-01

26

Evidence for a neurophysiologic auditory deficit in children with benign epilepsy with centro-temporal spikes.  

PubMed

Benign focal epilepsy in childhood with centro-temporal spikes (BECTS) is one of the most common forms of epilepsy. Recent studies have questioned the benign nature of BECTS, as they have revealed neuropsychological deficits in many domains including language. The aim of this study was to investigate whether the epileptic discharges during the night have long-term effects on auditory processing, as reflected on electrophysiological measures, during the day, which could underline the language deficits. In order to address these questions we recorded base line electroencephalograms (EEG), sleep EEG and auditory event related potentials in 12 children with BECTS and in age- and gender-matched controls. In the children with BECTS, 5 had unilateral and 3 had bilateral spikes. In the 5 patients with unilateral spikes present during sleep, an asymmetry of the auditory event related component (P85-120) was observed contralateral to the side of epileptiform activity compared to the normal symmetrical vertex distribution that was noted in all controls and in 3 the children with bilateral spikes. In all patients the peak to peak amplitude of this event related potential component was statistically greater compared to the controls. Analysis of subtraction waveforms (deviant - standard) revealed no evidence of a mismatch negativity component in any of the children with BECTS. We propose that the abnormality of P85-120 and the absence of mismatch negativity during wake recordings in this group may arise in response to the long-term effects of spikes occurring during sleep, resulting in disruption of the evolution and maintenance of echoic memory traces. These results may indicate that patients with BECTS have abnormal processing of auditory information at a sensory level ipsilateral to the hemisphere evoking spikes during sleep. PMID:16252074

Liasis, A; Bamiou, D E; Boyd, S; Towell, A

2006-07-01

27

Dipole reversal: an ictal feature in a patient with benign partial epilepsy of childhood with centro-temporal spike.  

PubMed

We describe the case of a 15-year-old boy who had the diagnosis of benign partial epilepsy of childhood with centro-temporal spike. During the EEG a subclinical electrographic seizure was recorded. The discharges were clearly electropositive in T4 with positive phase reversal between derivations F8-T4 and T4-T6. The whole episode lasted less than one minute (45 sec). The interictal right medio-temporal spikes reemerged after 60 sec and were electronegative in the same location after the end of the electrographic seizures. The mechanisms underlying this uncommon pattern on EEG is not well established. PMID:7487536

Silva, D F; Lima, M M; Anghinah, R; Zanoteli, E; Lima, J G

1995-06-01

28

Non-centro-symmetric electron diffraction pattern of icosahedral quasicrystal induced by combination of linear phason strain and curvature of Ewald sphere.  

PubMed

Non-centro-symmetric characteristics are observed in the experimental electron diffraction patterns (EDPs) from the icosahedral quasicrystalline precipitates in ZrAlNiCuNb alloys. Different from the well-known breaking of the Friedel's law, where a strong dynamical effect will reveal in EDPs the concealed non-centro-symmetry originated from the crystal structures themselves, the current results can be interpreted in terms of changes in deviation parameters due to a delicate combination of the linear phason strain characteristic of quasicrystals and the curvature of Ewald sphere. After taking this effect into consideration, the corresponding simulated EDPs fit quite well to the experimental data. PMID:24041584

Xiong, Dongxia; Lu, Lu; Wang, Jianbo; Zhao, Dongshan; Sun, Yufeng

2013-01-01

29

Characterization of the matrix glass transition in carbon-epoxy laminates using the CSD test geometry. [centro-symmetric deformation  

NASA Technical Reports Server (NTRS)

A new test geometry, referred to as centro-symmetric deformation (CSD), is proposed for characterizing the viscoelastic behavior of the matrix of carbon-epoxy laminates. The sample consists of a thin disk, typically 6-14 plies thick, having a nominal diameter of 30 mm. The disk is freely supported on a circular anvil; the load is applied to the center of the disk using an 8-mm-diameter ball bearing nosepiece. The CSD test geometry provides viscoelastic dispersion data which are independent of the angular orientation of the sample. The test geometry is sufficiently sensitive to matrix changes to allow its use for postcuring, humidity, crosslink density, and other matrix change studies. Test results are presented for a carbon-epoxy laminate.

Sternstein, S. S.; Yang, P.

1983-01-01

30

CENTRO UNIVERSITARIO MUNICIPAL LAJAS – GOBIERNO: UN EJEMPLO DE INTEGRACIÓN PARA LA ELABORACIÓN, SEGUIMIENTO Y MONITOREO DE LA ESTRATEGIA DE DESARROLLO LOCAL  

Microsoft Academic Search

En la presente investigación se elabora la estrategia de desarrollo local del municipio de Lajas, fusionando el trabajo del Centro Universitario Municipal y el gobierno del territorio, para la misma se hace un análisis histórico-lógico de la concepción de la gestión de proyectos y estrategias en función del desarrollo local, su objetivo principal es lograr de forma coordinada la resolución

Maribel Estrada Martín; Pedro Rafael Pretel Olite; Liliana Llanes Robaina

2012-01-01

31

Efectividad de un Programa de Promoción de Actividad Física (PPAF) desde los centros de atención primaria para aumentar los niveles de actividad física en población sedentaria  

Microsoft Academic Search

Introducción. La inactividad física es un factor de riesgo modificable de desarrollo de enfermedades crónicas. La elevada proporción de adultos sedentarios que acuden a los Centros de Atención Primaria (CAP) justifica las intervenciones de promoción de Actividad Física (AF) desde este ámbito. Objetivo. Evaluar la efectividad de un Programa de Promoción de Actividad Física (PPAF) desde Atención Primaria (AP) para

Martin-Borràs Carme; Giné-Garriga Maria; Martín-Cantera Carlos; Puig-Ribera Anna; Duran-Bellido Eulàlia; Solà-Gonfaus Mercè; PPAF grupo

2002-01-01

32

Spatial coherence of the ground motion produced by the 1979 Imperial Valley earthquake across El Centro Differential Array  

NASA Astrophysics Data System (ADS)

Spatial coherence of digitally recorded acceleration time histories across five elements of the El Centro Differential Array recorded during the October 15, 1979 Imperial Valley, California, earthquake is studied. Recorded within a total spacing of 214 m, the three-component time histories at five stations of this linear array provide a unique set of free-field data at sites of similar geology in the near field of a strong earthquake. The observed peak ground accelerations vary by as much as 43, 13 and 40% on the E-W, N-S and vertical components. It is shown that the incoherence of high frequency waves brought about by wave scattering near the receiver is partially responsible for the observed variation. This is evident from the frequency dependent reduction of the peak cross-correlation amplitudes of the strong phase of ground shaking. The observed reductions increase from ˜ 1% below 1 Hz to 20-30% in the 1-10 Hz band and to nearly 80% above 10 Hz. Investigation of the polarization angle of P-wave coda indicates that high frequency waves (> 10 Hz) approach the recording station randomly from nearly all directions. The peak cross-correlation of the polarization angle in general is lower than that of amplitudes. The successive sampling of this angle in the low frequency band suggest a northwestward propagation of the source during the faulting process.

Niazi, Mansour

1985-04-01

33

Progressive coaxial Variscan deformation in the Centro-Iberian Zone (Portugal): Serra do Moradal-Fajao complex syncline  

NASA Astrophysics Data System (ADS)

The Serra do Moradal-Fajão syncline is a major NNW-SSE Variscan structure developed in the SW sector of the Centro-Iberian Zone, one of the main geodynamical structures of the Iberian Variscides. This tight syncline with a 1.5 km wavelength, could be followed for more than 80 km and represents one of the most important regional structures. Its complex structure has been possible to characterize, not only due to excellent outcrop condition (mostly induced by the competent behaviour of the Lower Ordovician Armorican Quartzite Formation), but also to the detailed lithostratigraphic control of the Ordovician-Silurian lithologies. These units are present in a homogeneous regional distribution, unconformably overlain the Cambrian Beiras Group. Concerning the Variscan structures, their geometry and kinematics show that they could be ascribed to progressive deformation induced by the first and main D1 tectonic event. During this event, a complex NNW-SSE aggregation of fold and thrust arrays have been developed. At the macroscale, this pattern is mainly characterized by the Serra de Moradal-Fajão syncline. Both limbs of this major D1 Variscan fold, which present a slightly ENE facing, have been disrupted by convergent thrust systems, leading to the superposition of the Cambrian Beiras metasediments on top of the Ordovician-Silurian succession. Concerning its SW limb, a major single overthrust has been developed, the Vilar Barroco-Fajão one, although in some very localized sectors, some minor thrusts could be emphasized; as they present a ENE facing, they are interpreted as duplex style forethrusts in relation to the main overthrust. Regarding the NE limb, a different behaviour is found. Indeed, in this sector, an imbricated thrust system has been mapped; due to their WSW facing it should be considered as backthrusts. Concerning the temporal relations between the previously described structures, although in some rare cases backthrusts cut forethrusts, the scarcity of interference structures turns difficult the subdivision of the main tectonic Variscan phase in sub-events of regional meaning. Indeed, the described geometries and kinematics could be the result of progressive deformation in a coaxial regime. This coaxial deformation is also consistent with the mesoscopic Variscan structures of the Serra de Moradal-Fajão syncline. In fact, not only the geometry of the minor folds are similar to the major syncline, but also the coeval S1 cleavage presents an axial plane behaviour, emphasized by the regularity of the intersection L1 lineation, which is subparallel to the fold axes. Both the folds and the thrusts are distorted at the cartographic scale by ductile shear zones: N-S to NNE-SSW dextral and WNW-ESE to E-W sinistral. As these structures could be interpreted as conjugate shears induced by a stress field fully compatible with the D1 Variscan tectonic event they are considered as lateral ramps of the main thrust system. Some of the previous planar anisotropies are reactivated in a brittle regime during the late-Variscan orogenic cycle: mainly the N-S to NNE-SSW behaves as sinistral strike-slip faults. Alpine reactivation by NNW-SSE compression (Cebola reverse fault of the Central Cordillera system) induces also sinistral strike-slip on NE-SW and dextral strike-slip on ENE-WSW previous Variscan faults.

Metodiev, Daniel; Romao, Jose; Dias, Rui; Ribeiro, Antonio

2010-05-01

34

Introducing CAT (Centro di Allerta Tsunami), the Italian candidate Tsunami Watch Provider (It-cTWP) for the Mediterranean  

NASA Astrophysics Data System (ADS)

The recently established CAT (Centro di Allerta Tsunami) at Istituto Nazionale di Geofisica e Vulcanologia (INGV) will be part of the Italian National Tsunami Warning Center (It-NTWC) and it is a candidate Tsunami Watch Provider (cTWP) for the Mediterranean Sea in the framework of the Tsunami Early Warning and Mitigation System in the North-eastern Atlantic, the Mediterranean and connected seas (NEAMTWS). It-NTWC is a partnership of three Italian institutions: INGV, the Italian Department of Civil Protection (Dipartimento di Protezione Civile, DPC) and the Institute for Environmental Protection and Research (Istituto Superiore per la Protezione e la Ricerca Ambientale, ISPRA) which provides the sea-level data of the Italian mareographic network (Rete Mareografica Nazionale, RMN) in quasi-real-time. CAT is the operational part of the It-NTWC based at the INGV 24/7 seismic monitoring centre in Rome. CAT will be committed to deliver tsunami warning messages to DPC and, when it will enter its operational cTWP phase, to any IOC/UNESCO member state that will subscribe for the service. The current implementation of CAT is based on the NEAMTWS Decision Matrix (DM). Earthquake parameters are determined automatically by the Early-Est (EE) software, and used as an input to DM and tsunami travel times calculation to provide warning messages, including earthquake parameters, plus level of alert and estimated tsunami arrival time at pre-defined forecast points along threatened coasts. Basing on updated automatic EE solutions, seismologist's revision, and sea-level readings subsequent messages can be delivered until warning status ends. The use of the DM allows a rapid implementation of a tsunami warning system, but it does not consider some important features to better characterize a tsunami forecast, such as the earthquake's focal mechanism, the directivity of tsunami propagation and the morphology of the coast. More sophisticated procedures are currently under development: a database of pre-calculated, or calculated on the fly on GPU cards, tsunami scenarios, and rapid moment tensor calculation. The deployment of deep-sea tsunami (pressure) sensors is envisaged as well subject to budgetary constraints. A Decision Support System (DSS) is under development in order to integrate the different sources of information (earthquake parameters estimates and prior knowledge of the tectonic setting, numerical tsunami forecast, sea-level readings), and assist decision making during the first minutes after an event. CAT participated successfully in several NEAM communication tests within its function of National Tsunami Warning Focal Point (NTWFP) and the delivery of messages to DPC, ISPRA, and local authorities has also been tested. Preliminary CAT procedures have been tested internally, that is without delivering messages, also for two recent Mediterranean earthquakes: the M=6.6 occurred the 12th October 2013 offshore Crete and the M=5.9 occurred the 28th December 2013 offshore between Turkey and Cyprus. Here, we will present the current CAT implementation and describe its future developments.

Michelini, Alberto; Amato, Alessandro; Badiali, Lucio; Basili, Roberto; Bernardi, Fabrizio; Govoni, Aladino; Lauciani, Valentino; Lomax, Anthony; Lorito, Stefano; Mele, Francesco; Melini, Daniele; Molinari, Irene; Piatanesi, Alessio; Romano, Fabrizio; Selva, Jacopo; Selvaggi, Giulio; Sensale, Giampaolo; Tonini, Roberto; Vazzoler, Stefano; Zanolin, Francesco

2014-05-01

35

A Geostatistical Approach to Reducing Uncertainty in Rainfall Estimates Using Terrain Characteristics: A Case Study in the Central-North Regional Water Administration of Mozambique (ARA Centro-Norte)  

NASA Astrophysics Data System (ADS)

Many data-sparse regions, such as southern Africa, will likely face significant changes in water resources availability and timing in the future due land use change, climate change and population growth. Improved estimates of rainfall and streamflow are necessary to improve water resources decision-making, risk management, and uncertainty quantification. In this study, we use a universal kriging framework to associate various watershed terrain characteristics with gauged rainfall data to improve the estimation of monthly rainfall fields. We focus on available gauge data because other precipitation data sources, such as satellite precipitation products, are unavailable over historic periods of interest and exhibit bias in our context of streamflow estimation. Our study area is the 185,000 sq km Central-North Regional Water Administration of Mozambique (ARA Centro-Norte), which is predominantly rural tropical savanna. We use fifty years of spatially and temporally sparse monthly rainfall observations from 316 rainfall gauges. Most of the watershed terrain characteristics we use are derived from the 90m HydroSHEDS Digital Elevation Model dataset. These include elevation, aspect, slope, distance to large water bodies, distance to ridges, and distance to watershed rainfall maximum. We quantify the importance of these characteristics for reducing uncertainty in rainfall estimates using the Bayes information criterion (BIC) approach. Future work includes using these rainfall estimates to drive the semi-distributed monthly time-step Pitman rainfall-runoff model, in order to reduce uncertainty in streamflow estimates in gauged and ungauged basins.

Raheem, Y. T.; Freyberg, D. L.

2012-12-01

36

Guía práctica en Inglés para el reporte de casos, utilizada en estudios de postgrados en la Facultad de Ciencias Médicas \\  

Microsoft Academic Search

This paper is a guide that can be a helpful material for the postgraduate students, doctors and all workers from the health system that should master the English language to work in English speaking countries, this material can also be used in 4th and 5th years medicine. It can be a consulting instrument for young professors who teach medical English.

Luz Martha; Sintes Cobas; Roberto Sánchez Rodríguez; Baldomero Dovale Borjas

37

Residuos hospitalarios peligrosos en un centro de alta complejidad  

Microsoft Academic Search

Background: An inadequate management of hospital waste, that have toxic, infectious and chemical wastes, is a risk factor for humans and environment. Aim: To identify, quantify and assess the risk associated to the management of hospital residues. Material and methods: A cross sectional assessment of the generation of hazardous waste from a hospital, between June and August 2005, was performed.

Alejandra Neveu C; Patricia Matus C

2007-01-01

38

Second-harmonic generation in centro-symmetric semiconductors  

Microsoft Academic Search

Summary  The crystallographic dependence of optical-second-harmonic generation (SHG) in Si and Ge single crystals is obtained with\\u000a 10 ps pulses at 527 nm and at incident fluences above the threshold for laser melting of the crystal lattice. We find that\\u000a the experimentally observed dependence of SHG on crystal orientation remains unchanged up to the damage limit. Observed selection\\u000a rules are analysed

D. Guidotti; T. A. Driscoll

1986-01-01

39

The la Plata Astronomical Data Center  

NASA Astrophysics Data System (ADS)

RESUMEN. El Centro de Datos Astron6micos tiene su sede en la Facuitad de Ciencias Astron6micas y Geofisicas d la Universidad Nacional de La Plata y funciona por convenio entre esta facultad y el Centre des Stellaires de la Universite' Louis Pasteur en Estrasburgo (CDS), Francia. La finalidad de este centro es la de proveer a los astr6nomos del area con copias de los alrededor de 500 acumulados y/o preparados por el CDS a la vez que promover la producci6n y/o acumulaci6n de en el rea. Para la realizaci6n de esta tarea se cuenta con el apoyo del Centro Superior para el Procesamiento de la Informaci6n (CESPI) de la UNLP cuyos equipos se describen. Las tareas que se estan realizando incluyen la distribuci6n de SIMBAD a los astr6nomos argentinos y se efectuan ensayos de distribuci6n en linea de CD-ROM TEST DISK del Astronomical Data Center (ADC) de la NASA que contiene los 31 mas solicitados por los astr6nomos de todo el mundo. ABSTRACl The La Plata Astronomical Data Center operates by an agreement between the Facultad de Ciencias Astron6micas y Geofisicas at La Plata University and the Centre des Donnees Stellaires of Louis Pasteur University at Strasbourg (CDS), France. The purpose of the Center is to provide to the area astronomers with copies of the catalogs they need amongst those stored and/or prepared at CDS. At the same time the center will act of the astronomical data produced within its area. K words: DATA ANALYSIS

Marraco, H. G.

1990-11-01

40

CONTENIDO MINERAL EN LOS FORRAJES Y SANGRE DE BOVINOS DE LOS DISTRITOS DE TILARAN CENTRO, UPALA CENTRO Y BIJAGUA, COSTA RICA17  

Microsoft Academic Search

Mineral content of forages and blood from cattle in the districts of Tilaran, Upala and Bijagua, Costa Rica. The calcium, phosphorus and magnesium nutri- tion of grazing beef cattle from three selected districts of Costa Rica were studied. Eighty three forage samples from ten different ,species were collected in 18 farms throughout three Counties and eighty six blood samples were

Hernan Fonseca; Emilio Vargas; Manuel Pontigo; Carlos Portillo

41

Reducción y reciclaje de residuos sólidos urbanos en centros de educación superior: Estudio de caso  

Microsoft Academic Search

The municipal waste generated by CINVESTAV-Mérida was characterized for a period of three years. The municipal solid waste was composed of 48 % organics; 20% cardboard and paper; 8 % soft drinks or purified water plastic bottles (polyethylene terephthalate, PET) and diverse plastics; 5 % glass bottles or containers and broken laboratory glass; 2 % aluminium cans, and 17 %

L. Maldonado

2006-01-01

42

Crecimiento adiabático de un agujero negro en el centro de un sistema estelar  

NASA Astrophysics Data System (ADS)

We present preliminary results on the dynamical influence of an adiabatically grown central black hole upon its surroundings. Young (1980), in his pioneer work, found an r-3/2 density profile for the neighborhood of a black hole, a result not confirmed by observation. In this work, we extend Young's result to a more realistic case, namely an inhomogeneous galactic center, although keeping the spherical symmetry hypothesis, in order to verify whether the final density profile changes.

Arrigoni, M.; Carpintero, D. D.

43

O uso prolongado de benzodiazepínicos em mulheres de um centro de convivência para idosos  

Microsoft Academic Search

While experts recommend caution against long-term benzodiazepine use in the elder- ly, survey data suggests that the use of benzodiazepine increase with age. The patterns of benzo- diazepine use and factors associated with long-term use in population at risk were studied with a standarlized questionnaire applied to 634 women over 60, who attended a daycare center for older people in

Gisele Huf; Claudia de Souza Lopes; Suely Rozenfeld

2000-01-01

44

AMENAZAS Y NUEVAS ESTRATEGIAS DEL COMERCIO DE CENTRO URBANO. EL CASO  

Microsoft Academic Search

In recent decades, Spanish cities have developed in a fashion hitherto unknown. One of the most important agents is trade, because trade has the propensity to determine the structure of the territory as well as contributing to the renovation, reduction or expansion of its urban areas. The city of Alicante presents us with a good example of how a tertiary

DE ALICANTE

45

Language in Benign Childhood Epilepsy with Centro-Temporal Spikes Abbreviated Form: Rolandic Epilepsy and Language  

ERIC Educational Resources Information Center

Although Benign Childhood Epilepsy with Centrotemporal Spikes (BECTS) has a good prognosis, a few studies have suggested the existence of language disorders relating to the interictal dysfunction of perisylvian language areas. In this study, we focused on language assessment in 16 children aged 6-15 currently affected by BECTS or in remission. An…

Monjauze, C.; Tuller, L.; Hommet, C.; Barthez, M.A.; Khomsi, A.

2005-01-01

46

Language in benign childhood epilepsy with centro-temporal spikes abbreviated form: rolandic epilepsy and language.  

PubMed

Although Benign Childhood Epilepsy with Centrotemporal Spikes (BECTS) has a good prognosis, a few studies have suggested the existence of language disorders relating to the interictal dysfunction of perisylvian language areas. In this study, we focused on language assessment in 16 children aged 6-15 currently affected by BECTS or in remission. An important proportion of children showed moderate or more severe language impairment. The most affected domains were expressive grammar and literacy skills. We found linguistic deficits during the course of epilepsy but also persistent deficits in children in remission, suggesting possible long-term effects. Our results support the hypothesis that BECTS may be associated with impairment to language and suggest the possibility of a direct link between epileptic activity and language development, and the existence of long-term consequences. PMID:15721962

Monjauze, Cécile; Tuller, Laurice; Hommet, Caroline; Barthez, Marie-Anne; Khomsi, Abdelhamid

2005-03-01

47

Incidencia de anemia de células falciformes en niños, centro materno infantil San Lorenzo de Los Mina  

Microsoft Academic Search

RESUMEN Se realizó un estudio prospectivo de corte transver- sal, considerando para el mismo una alta incidencia de anemia de células falciformes ingresado en este período, los cuales fueron 24 pacientes en sala de pediatría. Para este estudio consideramos como variables la incidencia, la edad, el sexo, la raza, tipo de crisis, antecedentes no patológicos, antecedentes, personales, patológicos, an- tecedentes

Solcires Beltre Morillo; Yoselín Cueto Santana; Belkis Rosario Garda; Leonardo Fernández Durán; Sujey Milagros; Vargas Santana; Rita González

48

75 FR 17561 - Amendment to Restricted Area R-2510A; El Centro, CA  

Federal Register 2010, 2011, 2012, 2013

...0700-2300 local time daily; other times by NOTAM at least 24 hours in advance. Controlling agency. FAA, Los Angeles ARTCC. Using agency. Commanding Officer, U.S. Navy Fleet Area Control and Surveillance Facility, San Diego, CA. Issued...

2010-04-07

49

Valve Surgery at the Hospital de Cardiologia Y Neumologia Del Centro Medico Nacional IMSS *  

PubMed Central

From January 1964 until February 1985, we performed 8,370 prosthetic valve procedures; this represents 54.32% of our total surgical load. Approximately 93% of the replacements were for rheumatic valve disease; the rest were for ischemic, myxomatous, degenerative, congenital, and traumatic heart disease. All cases were between New York Heart Association (NYHA) Classes II and IV; almost all patients had heart catheterizations before surgery. During the last 6 years, all patients had echocardiograms before undergoing heart catheterization.

Martinez-Banuet, Rogelio; Maulen-Radovan, Ximena; Ibarra-Perez, Carlos; Diaz-Devis, Cuauhtemoc; Ramirez-Godinez, Fernando; Palacios-Macedo, Xavier

1985-01-01

50

The acoustic design of the Centro Nacional de las Artes in Mexico City  

NASA Astrophysics Data System (ADS)

In this paper the acoustic design of the separate buildings housing the school of music, school of drama, and school of dance that opened in 1996 will be described. Spaces that JHA designed included practice rooms, studios, rehearsal rooms, black box, and concert hall. Details of room acoustic treatments, sound isolation measures, and venturi air flow will be illustrated. An overview of the entire project will also include the 500 seat multipurpose theater (with variable absorption systems) and the Alla Magna. Differences between the American and Mexican styles of consulting, importing of materials, installation, and commissioning will also be discussed.

Cooper, Rusell

2002-11-01

51

La Communicacion entre los Centros de Investigacion en Educacion (Communication among Educational Research Centers).  

ERIC Educational Resources Information Center

In Latin America there is a lack of communication concerning educational research. This lack has been underlined in many regional meetings, but no action has been taken. Possible steps that would lead to improvement include circulation of research summaries, both for completed and current works, efforts by research centers to organize meetings,…

Schiefelbein, Ernesto

1972-01-01

52

Sistemas de producción de Spondias purpurea (Anacardiaceae) en el centro-occidente de México  

Microsoft Academic Search

Production systems of Spondias purpurea (Anacardiaceae) in Central West México. Morphological, physical and chemical traits related with fruit quality characteristics of Spondias purpurea L. agroecosystems were studied in Central-West Mexico for wild and cultivated populations. Spondias purpurea regularly thrive in shallow, rocky infertile soils unsuitable for conventional crops. The weight, axial and radial length, pH, total soluble solids (SST), reducing

Blanca C. Ramírez Hernández; Pimienta Barrios Eulogio; Javier Z. Castellanos Ramos; Alejandro Muñoz Urias; Guadalupe Palomino Hasbach; Enrique Pimienta Barrios

2008-01-01

53

Utilización de datos de satélite operacionales en Centro América como apoyo en el manejo de desastres  

Microsoft Academic Search

In order for Central American countries to be able to respond to weather related disasters, they need to have strong meteorological forecasting capabilities, knowledge of the current state of the land and water resources, and emergency plans of action. In response to the devastating effects of Hurricane Mitch (October 1998), the United States Agency for International Development funded a project

BERNADETTE CONNELL; MARK DEMARIA; VILMA CASTRO LEÓN; ROSARIO ALFARO; Y JANICE SESSING

54

NOTAS SOBRE NEÓFITAS 3. DISTRIBUCIÓN DE ALGUNAS BRASSICACEAE DE RECIENTE INTRODUCCIÓN EN EL CENTRO DE MÉXICO  

Microsoft Academic Search

Additional information is presented on the distribution of various exotic species of Brassicaceae, introduced recently to central Mexico. Three populations of Thlaspi arvense L. and Sinapis alba L. are reported. The species Diplotaxis muralis (L.) DC., Hirschfeldia incana (L.) Lagrèze-Fossat and Brassica tournefortii Gouan, known previously from northern Mexico, are now naturalized at various localities in the central part of

HEIKE VIBRANS

55

Infección respiratoria aguda en niños que acuden a un centro de desarrollo infantil  

Microsoft Academic Search

Objective. To assess the incidence of acute respiratory in- fections and bacterial colonization in children attending a daycare center. Material and Methods. A cohort study was conducted from April to Octuber 1999, among 85 chil- dren aged under four years, who attended the daycare center at Hospital Infantil de Mexico (Mexico City's Children's Hospital) \\

Eugenia Nandí-Lozano; Luz Elena Espinosa; Lucía Viñas-Flores; Carlos Avila-Figueroa

2002-01-01

56

EL PROFESORADO Y LA VIOLENCIA EN LOS CENTROS. EL ASESORAMIENTO «EXPERTO» Y LA EXCLUSIÓN DEL PROFESORADO  

Microsoft Academic Search

This article seeks to contribute to the debate on th e concept of «violence in schools» and the different strategies carried out as educational response. First, the complex structure of violence related difficulties is stated. As a result, we point out the negative aspects of so called «expert» intervention practices which suggest «preconceived standard recipes» to be applied to these

Rodrigo Juan García Gómez; Comunidad de Madrid

57

La Seccion de Investigacion sobre Educacion Medica de la Facultad de Medicina de la Universidad National Autonoma de Mexico (The Medical Education Investigation Section of the School of Medicine of UNAM).  

ERIC Educational Resources Information Center

This document is an English-language abstract (approximately 1,500 words) of a survey of Mexican medical education needs for the future. To plan for these needs, SISEM of UNAM was formed with the objectives of carrying out and promoting investigations in the different areas of medical education. It also wants to distribute the information…

Campillo Sainz, Carlos; Alvarez, Tostado, Juan

58

VIGILÂNCIA EPIDEMIOLÓGICA DA SÍFILIS NA GRAVIDEZ NO CENTRO DE SAÚDE DO BAIRRO URUARÁ-ÁREA VERDE EPIDEMIOLOGICAL SURVEILLANCE ON SYPHILIS IN THE PREGNANCY AT CENTRO DE SAÚDE DO URUARÁ-ÁREA VERDE DISTRICT  

Microsoft Academic Search

o de fevereiro a 31 de maio de 2007. A efetividade da vigilância foi relacionada com a preconizada pelo MS, referente à solicitação do teste não-tre- ponêmico (VDRL) correlacionado com idade gestacional de adesão ao programa, número de gestações, partos e abortamentos anteriores. Resultados: na amostra considerada, observou-se: amplitude da idade materna de 14 a 37 anos; 56 gestantes <

Osmarina N Pires; Marcos Vinicius S Santos; Wilkcy A Santos

59

Study of seismic response at Stations 6 and 7, El Centro Strong Motion Array, Imperial Valley, California  

NASA Astrophysics Data System (ADS)

The process of assembling the shear-strength profiles is described. The profiles were derived from available data based on cone penetration and laboratory tests. A parametric study was conducted in which a number of earthquake motions as well as the strength profiles and their variations were considered as input to nonlinear seismic response computations.

Chen, A. T.

1983-09-01

60

Home-Type Activities at the Day Care Center. (Tipos De Actividades Del Hogar En El Centro De Cuidado Diario.)  

ERIC Educational Resources Information Center

This paper argues that home activities comprise a valuable unplanned curriculum and that many of these activities can be transferred to the day care center. It is suggested that these activities foster a closer relationship between child and caregiver and bridge the gap between familiar home environment and novel day care setting. Home activities…

Aaronson, May; Moberg, Patricia E.

61

134 casos consecutivos de revascularización carotídea mediante angioplastia y stent en un centro de referencia: ¿una técnica de riesgo?  

Microsoft Academic Search

IntroductionCarotid revascularisation (CR) using angioplasty and stent (ASC) is an effective procedure in the prevention of ischaemic stroke, but with a controversial morbidity and mortality in the different studies conducted in this field.

G. Parrilla; J. Zamarro; M. Espinosa de Rueda; A. Lüttich; M. Garrote; A. Morales; B. Escribano; C. Lucas; F. Martínez García; R. Hernández-Clares; J. López; I. Villegas; T. Tortosa; A. Moreno

2010-01-01

62

A Curriculum for a Pre-beginning Class at the Centro Cultural Costarricense Norteamericano in San Jose, Costa Rica.  

ERIC Educational Resources Information Center

This report presents a curriculum for true beginning English-language students at the Costa Rican American Cultural Center (CCCN) that was developed specifically for students whose skills were not adequate for regular beginning "1A" classes. Information was gathered from CCCN teachers who had previously taught the target population. The goal of…

Carduner, Marianne

63

Menarca, gravidez precoce e obesidade em mulheres brasileiras selecionadas em um Centro de Saúde de Belo Horizonte  

Microsoft Academic Search

The aim of this study was to investigate obstetric variables potentially associated wit h obesity among 486 Brazilian childbearing-age women aged 15-59 residing in the municipality o f Belo Horizonte, Minas Gerais State. Body fat (BF) was measured through impedance analysis , and obesity was defined as BF ? 30%. The association between obstetrics factors and obesity wa s evaluated

64

Molecular diagnosis of haemophilia A at Centro Hospitalar de Coimbra in Portugal: study of 103 families--15 new mutations.  

PubMed

Haemophilia A (HA), the most commonly inherited bleeding disorder, has well known phenotype heterogeneity, influenced by the type of mutation, modulating factors and development of inhibitors. Nowadays, new technologies in association with bioinformatics tools allow a better genotype/phenotype correlation. With the main objective of identifying familial carrier women and to offer prenatal diagnosis, 141 HA patients belonging to 103 families, followed or referred to the Haemophilia Centre of CHC, E.P.E., were studied. Molecular diagnosis strategy was based on HA severity: IVS22 and IVS1 inversions, direct sequencing and MLPA technique. New missense and splicing mutations were further analyzed using molecular modelling. Genotype/phenotype correlation was assessed taking into account the known modulating factors. During this study, mutations were detected in 102/103 families, carrier status was determined in 83 women and 14 prenatal diagnoses were performed. In a total of 46 different mutations identified, 15 have not been reported previously by the HAMSTeRS and HGMD. Genotype/phenotype correlation revealed two cases with a clinical picture less severe than expected by the type of mutation identified. Six patients developed inhibitors: five severe (IVS22, IVS1, large deletion) and one mild (p. Gln2265Lys). The adopted strategy allowed the identification of 99% of the molecular alterations underlying the HA phenotype (98% detection rate for severe and 100% for moderate and mild). Evaluation of genotype-phenotype correlation was complemented with structural protein modelling of newly identified missense mutations, contributing to better understanding of the disease-causing mechanisms and to deepening knowledge on protein structure-function. PMID:21645180

Silva Pinto, C; Fidalgo, T; Salvado, R; Marques, D; Gonçalves, E; Martinho, P; Markoff, A; Martins, N; Letícia Ribeiro, M

2012-01-01

65

Composición y propiedades cerámicas de las pizarras de la Zona Centro Ibérica del Macizo Ibérico Meridional (Norte de Jaén, España)  

Microsoft Academic Search

Composition and ceramic properties of shales from the Central-Iberican Zone of Southern Iberian Massif (Northern Jaen, Spain) The suitability of shale materials from the Iberian Massif in the Jaén province (Spain) to make ceramic materials has been eva- luated. The main components of these shales are illite, kaolinite, quartz and feldspars, with lesser amounts of chlorite, pyro- phyllite, paragonite and

M. VÁZQUEZ; J. PARRAS

66

Identificación e Incidencia de Virus en Pimiento en la Zona Centro Norte de Chile y su Asociación con Vectores  

Microsoft Academic Search

A B S T R A C T During the 2001-2002 and 2002-2003 seasons, a virus survey was carried out on peppers (Capsicum annuum L.) in different locations of the Region of Coquimbo (29,5-32° S lat.). The DAS-ELISA test was used for virus detection. The relative importance of the viruses encountered was as follows: Cucumber mosaic virus (CMV) 23.3%; Tomato

2005-01-01

67

Centro de Estudos de Avifauna Ibbrica, Rua do Raimundo 119, Apart. 535, 7000-506 tvora, Portugal  

Microsoft Academic Search

In 1998 and 1999, we carried out a systematic survey of the Osprey (Pandion haliaetus) in the Cape Verde Islands, to evaluate its population and conservation status. Some poorly surveyed areas were revisited in the summer of 2001 to complete our status assessment. We found an estimated 72-81 pairs on the archipelago, of which 94% were concentrated in the northern

PEDRO VAZ PINTO

68

Extenso estudio realizado en muchos centros demuestra que hay una precisión comparable de la colonoscopia virtual con la colonoscopia convencional  

Cancer.gov

Según los resultados del Estudio Nacional de Colografía de Tomografía Computarizada de la American College of Radiology Imaging Network, ACRIN, la colografía de tomografía computarizada, también conocida como colonoscopia virtual, es comparable a la colonoscopia convencional en su capacidad para detectar con precisión cáncer y pólipos precancerosos y podría servir como examen selectivo inicial de detección de cáncer colorrectal. La colonoscopia convencional usa un tubo largo, flexible, con cámara, para ver el revestimiento del colon.

69

Áreas con potencial para el establecimiento de árboles forrajeros en el centro de Chiapas Potential areas for establishment of forage trees in central Chiapas, Mexico  

Microsoft Academic Search

Forage tree species in central Chiapas, Mexico, were geographically located, their foliage nutritionally analyzed and their locations edaphoclimatically characterized to spatially delimit other areas in the region with similar characteristics. Fourteen promising forage tree species were identified at 72 sampling sites in eight transects. The sites' geographic coordinates were taken and used to generate maps of soil and climate conditions

Jaime López Martínezd

70

Summary Report for National Aeronautics Space Administration (NASA) and Centro Para Prevencao da Poluicao (C3P) 2011 International Workshop on Environment and Alternative Energy  

NASA Technical Reports Server (NTRS)

The C3P &. NASA International Workshop on Environment and Alternative Energy was held on November 15-18, 2011 at the European Space Agency (ESA)'s Research and Technology Centre (ESTEC) in Noordwijk, The Netherlands. The theme of the workshop was "Global Collaboration in Environmental and Alternative Energy Strategies". The workshop was held at ESTEC's conference center. More than 110 individuals from eleven countries attended the workshop. For the first time since the inception of NASA-C3P workshops, a full day was dedicated to a student session. Fifteen students from around the globe gave oral presentations along with poster displays relating to the latest technologies in environmental and alternative energy strategies. Judges from NASA, C3P and ESA awarded plaques to the top three students. In addition to the students, thirty eight U.S. and international subject matter experts presented on the following general environmental-related topics: (1) Hazardous materials management and substitution in support of space operations (2) Emerging renewable and alternative energy technologies (3) Sustainable development and redevelopment (4) Remediation technologies and strategies The workshop also included a panel discussion on the topic of the challenges of operating installations across borders. Throughout the workshop, attendees heard about the scope of environmental and energy challenges that industry and governments face. They heard about technologies for increasing energy efficiency and increasing use of renewable energy. They learned about ways companies and government agencies are using materials, processes, goods and services in a manner more respectful with the environment and in compliance with health and safety rules. The concept of partnerships and their inherent benefits was evidenced throughout the workshop. Partnering is a key aspect of sustainability because sustainable development is complicated. Through formal presentations and side discussions, attendees commented on the need for continued exploration of joint projects of mutual interest.

Greene, Brian

2011-01-01

71

PRIMER REPORTE SOBRE FOTOSENSIBILIZACION CAUSADA POR Pithomices chartarum EN BORREGOS PASTOREANDO Brachiaria brizantha. EN LA ZONA CENTRO DEL ESTADO DE TAMAULIPAS  

Microsoft Academic Search

RESUMEN: La creciente explosión demográfica, sobre todo en los países subdesarrollados, como lo es México, se han dado a la tarea de aumentar los productos alimentarios de origen animal por citar un ejemplo, la explotación de ovinos, mismo que a su vez se buscan nuevas alternativas para su alimentación, sobre todo con costos mínimos, por ello la utilización de recursos

O. S. Escamilla Gallegos; P. Zárate Fortuna; M. Rodríguez Morales; J. García Jiménez; M. González

72

Comunicación breve \\/ Short report Consultas realizadas a un Centro de Información del Medicamento colegial Consults done to an Association drug information center  

Microsoft Academic Search

Objective: to evaluate information needs of Pharmacist Association drug information center users, and to determine if consultations are resolved in an useful time. Methods: Two month length descriptive, observational study, where consultations were introduced in a computer application (Crisol), and distributed into areas and sub-areas. Results: Most of the consults distributed by areas refer to magistral compounding (61%), followed by

Carmen VACAS BARRANCO; Ernesto SÁNCHEZ GÓMEZ

73

O POTENCIAL DE IMAGENS QUICKBIRD PARA ANÁLISE DO RELEVO DE UM SETOR DO PLANALTO DAS ARAUCÁRIAS, RS: CENTRO DE PESQUISAS E CONSERVAÇÃO DA NATUREZA PRÓ-MATA  

Microsoft Academic Search

This paper analyzes the potential of high-resolution images (QuickBird satellite) to mapping the relief features of a sector of the Planalto das Araucárias, an elevated area in northeastern Rio Grande do Sul, State, Brazil. The Center for Research and Nature Conservation PRÓ-MATA was chooses as an experimental area. In 1994, the PRÓ-MATA was created to perform studies and to propose

Eduardo da Silva Pinheiro; Hermann Johann; Heinrich Kux; Jorge Alberto Villwock

74

77 FR 68813 - Notice of Closure of Airport Mesa/Carizzo Creek Shooting Area in Eastern San Diego County, CA  

Federal Register 2010, 2011, 2012, 2013

...INFORMATION CONTACT: Daniel Steward, BLM El Centro Field Office, 1661 S. 4th St., El Centro, CA 92243, telephone 760-337-4400. SUPPLEMENTARY...need to provide for public safety. The BLM El Centro Field Office prepared an environmental...

2012-11-16

75

75 FR 19422 - Notice of Closure of Airport Mesa/Carizzo Creek Shooting Area in Eastern San Diego County, CA  

Federal Register 2010, 2011, 2012, 2013

...INFORMATION CONTACT: Daniel Steward, BLM El Centro Field Office, 1661 S. 4th St., El Centro, CA 92243, telephone (760) 337-4400...need to provide for public safety. The BLM El Centro Field Office prepared an environmental...

2010-04-14

76

77 FR 22755 - Foreign-Trade Zone 257-Imperial County, CA; Site Renumbering Notice  

Federal Register 2010, 2011, 2012, 2013

...Brawley, Calexico, Calipatria and El Centro, California. The current update...5: (531 acres)--within the El Centro Community Redevelopment Agency project...Road, Dogwood Road and I-8), El Centro; Site 6: (3.46...

2012-04-17

77

Centro Nazionale Oms per l'Influenza: Sorveglianza Virologica Dell'Influenza in Italia (Stagione 2005-2006) (National Influenza Centre: Virological Influenza Surveillance in Italy (2005-2006 Season)).  

National Technical Information Service (NTIS)

Influenza is an acute respiratory illness. It occurs all over the world and causes considerable morbility and mortality every year. Vaccination is one of the main influenza prevention methods. Due to the constantly changing composition of the circulating ...

2006-01-01

78

Centro Nazionale Influenza. Sorveglianza Virological dell'Influenza in Italia (Stagione 2004-2005). Rapporto Preliminare (WHO National Influenza Centre. Virological Influenza Surveillance in Italy (2005-2005 Season). Preliminary Report).  

National Technical Information Service (NTIS)

Influenza virus infections are responsible for a highly contagious respiratory disease, which typically results in seasonal epidemics. Vaccination is one of the main influenza prevention methods. Due to the frequent genetic changes of the influenza viruse...

I. Donatelli S. Puzelli C. Affinito L. Calzoletti

2005-01-01

79

Patrones locales de cambio globales: efectos de la emigración en el cambio de uso de suelo en el centro de México. El caso de la cuenca del Lago de Cuitzeo, México  

Microsoft Academic Search

En la actualidad existen notables desplazamientos de personas, ocasionados por la pobreza, las guerras, la degradación del medio ambiente, etc., en el planeta más de 125 millones de seres humanos viven fuera de sus países de origen. En este trabajo se describen las implicaciones de la migración sobre el cambio de cobertura y uso del terreno. El caso de estudio

Erna López; Gerardo Bocco

2007-01-01

80

Centro Nazionale OMS per l'Influenza. Influenza Aviaria e Rischio di Pandemia: Potenziamento della Rete Nazionale dei Laboratori INFLUNET (WHO National Influenza Centre. Avian Influenza and Pandemic Risk: Strengthening of the National INFLUNET Laboratory Network).  

National Technical Information Service (NTIS)

This Report describes the activities to be implemented in the context of a Pandemic Plan. In fact, the role of the laboratory is of paramount importance in the prevention and/or management of any infectious emergence, allowing the rapid identification of ...

2006-01-01

81

Foreign body aspiration in children and adolescents: experience of a Brazilian referral center* Aspiração de corpo estranho por menores de 15 anos: experiência de um centro de referência do Brasil  

Microsoft Academic Search

Objective: To describe the clinical, radiological and endoscopic characteristics of foreign body aspiration among individuals under the age of 15 treated at a referral center in the city of São Luís, Brazil. Methods: This was a descriptive study using data from the medical charts of patients treated for foreign body aspiration at the Hospital Universitário Materno Infantil between 1995 and

Sílvia Teresa; Evangelista Vidotto; Marco Antonio Barbieri; José Albuquerque de Figueiredo Neto

82

EFECTO DEL GATUÑO SOBRE LA FERTILIDAD DEL SUELO Y LA BIOMASA HERBÁCEA EN PASTIZALES DEL CENTRO DE MÉXICO Effect of Catclaw Mimosa on Soil Fertility and Forage Yield in Rangelands in Central Mexico  

Microsoft Academic Search

RESUMEN El trabajo se realizó durante los años 2002 y 2003, en los estados de Aguascalientes y Jalisco, con el objetivo de evaluar el efecto del gatuño (Mimosa monancistra) en el grado de asociación de algunas variables edáficas, como pH, materia orgánica (MO), fósforo, calcio y magnesio, así como la cantidad de biomasa herbácea en tres sitios con diferente grado

Ernesto Flores; Juan Frías; Pedro Jurado; Víctor Olalde; Juan de Dios Figueroa; Arturo Valdivia; Edmundo García

83

Attivita del Centro di Linguistica Applicata nel campo della lingua e della cultura italiana all'estero (Activities of the Italian Center for Applied Linguistics concerning Italian Language and Culture Abroad).  

ERIC Educational Resources Information Center

Outlines the activities of a recently created section of the Italian Center for Applied Linguistics (CILA), dealing with "Teaching Italian Abroad." Describes these activities as encompassing four areas: research, teaching methodology, consultation, teachers' training and bibliographical information. Lists statistical surveys, research papers, and…

Boriosi Katerinov, Maria Clotilde

1979-01-01

84

Sesto Programma Nazionale di Ricerca Sull'AIDS Piano Esecutivo: A Cura del Centro Nazionale AIDS per la Patogenesi e Vaccini Contro HIV/AIDS (National Research Program on AIDS (Sixth): Operational Plan).  

National Technical Information Service (NTIS)

The sixth National Research Program on AIDS is divided in intramural and extramural research projects. The extramural Program is divided as follows: (1) HIV/AIDS Epidemiology; (2) HIV/AIDS Etiopathogenesis and immunological and virological studies; (3) Cl...

2006-01-01

85

ESTRÉS LABORAL, VULNERABILIDAD Y FATIGA EN OPERARIOS DE CALDERAS DE VAPOR DE AGUA DE CENTROS DE SALUD DEL MUNICIPIO ARROYO NARANJO OCCUPATIONAL STRESS, VULNERABILITY AND FATIGUE IN WORKERS OF WATER VAPOR BOILERS FROM HEALTH INSTITUTIONS  

Microsoft Academic Search

All the 10 workers of water vapour boilers from health institu- tions of Arroyo Naranjo municipality of Havana City were studied in order to evaluate the occupational stress according to the Karasek's Demand-Control pattern. A questionnaire was applied to measure the vulnerability at the stress and the level of fatigue ac- cording to the Yoshitake test. In these workers we

Lourdes Marrero Santos; José Ignacio Portuondo Duany; Ofelia Francisca; Arredondo Naite; María Elena; Pastor Arango

86

Notiziario dell'Istituto Superiore di Sanita, Volume 22, Numero 6 - Supplemento 1 - 2009. Malattie rare farmaci orfani: a cura del Centro Nazlonale Malattie Rare. Numero 8. (Report on the Status of Health in the European Union.)  

National Technical Information Service (NTIS)

The 'Report on the Status of Health in the European Union' is the main deliverable of a joint undertaking (the EUGLOREH project) of health authorities or institutions from all European Union (EU) Member State, Croatia, Turkey, Iceland and Norway, and majo...

2009-01-01

87

El Instituto de Nutrici?n de Centro Am?rica y Panam?: Servicios de Informaci?n Cient?fica en Una Regi?n en V?a de Desarrollo *  

PubMed Central

Pioneering scientific information in underdeveloped areas poses several problems, such as (1) lack of understanding on the part of key functionaries as to the why, what, and when of information services; (2) lack of trained personnel to assume the responsibility for such services; (3) lack of economic resources; and (4) lack of information pertaining to available bibliographical sources in the particular area or region. The Bibliographic and Documentation Service of the Institute of Nutrition of Central America and Panama (INCAP) provides, in addition to the customary services, technical assistance for the organization or reorganization of biomedical libraries and makes INCAP library materials available to member countries, either by loan or photocopy. Although the program was designed for the member countries, INCAP tries to make its services available to other Latin American nations, Africa, and Asia, where similar nutritional problems are being studied.

Flores, Raquel; Corado, Adelina; Giron, Arturo

1964-01-01

88

COMPOSICIÓN DEL ACEITE ESENCIAL EN GERMOPLASMA DE Tagetes filifolia Lag. DE LA REGIÓN CENTRO-SUR DE MÉXICO COMPOSITION OF ESSENTIAL OIL IN GERMPLASM OF Tagetes filifolia Lag. FROM CENTRAL-SOUTH REGION OF MÉXICO  

Microsoft Academic Search

The essential oils of Tagetes filifolia have potential for controlling insects that are biotransmitters of virus in plants. The objective of the present study was to evaluate the composition of the essential oil of 78 accessions of T. filifolia of the south-central region of México, established in Chapingo, México. When the plants presented flowering, the extraction of the essential oils

Miguel Á. Serrato-Cruz; Francisco Díaz-Cedillo; Juan S. Barajas-Pérez

89

75 FR 25210 - Procurement List Proposed Additions and Deletions  

Federal Register 2010, 2011, 2012, 2013

...Janitorial, Customs and Border Protection, B.P. Sector Maintenance, 398 E. Aurora Drive, El Centro, CA NPA: ARC-Imperial Valley, El Centro, CA Contracting Activity: Department of Homeland Security, Bureau of Customs and Border...

2010-05-07

90

77 FR 4400 - Additional Designations, Foreign Narcotics Kingpin Designation Act  

Federal Register 2010, 2011, 2012, 2013

...Jorge Andres FERNANDEZ CARBAJAL, 2 Calle 6AVE, Barrio El Centro San Pedro Sula, Cortes, Honduras, Registration RUC...Jorge Andres FERNANDEZ CARBAJAL, 2 Calle 6AVE, Barrio El Centro San Pedro Sula, Cortes, Honduras, Registration...

2012-01-27

91

78 FR 59766 - Additional Designations, Foreign Narcotics Kingpin Designation Act  

Federal Register 2010, 2011, 2012, 2013

...contiguo a DIPPSA, Tocoa, Colon, Honduras; Barrio El Centro, Tocoa, Colon, Honduras; RTN 08019009234360 (Honduras...PALMEROS DEL BAJO AGUAN''), Tocoa, Colon, Honduras; El Centro Principal, 1 Ave 2 Cll, No. 13, Tocoa, Colon,...

2013-09-27

92

76 FR 80962 - Notice of Availability of the Record of Decision for the Tule Wind, LLC's Tule Wind Project, San...  

Federal Register 2010, 2011, 2012, 2013

...decision. ADDRESSES: Copies of the ROD are available upon request from the Field Manager, BLM El Centro Field Office, 1661 S. 4th Street, El Centro, California 92243, and the BLM California Desert District Office, 22835 Calle San Juan de...

2011-12-27

93

75 FR 38468 - Procurement List; Additions and Deletions  

Federal Register 2010, 2011, 2012, 2013

...Janitorial, Customs and Border Protection, B.P. Sector Maintenance, 398 E. Aurora Drive, El Centro, CA. NPA: ARC-Imperial Valley, El Centro, CA. Contracting Activity: Bureau of Customs and Border Protection, Office of...

2010-07-02

94

78 FR 36568 - Notice of Availability of the Record of Decision for the Approved Imperial Sand Dunes Recreation...  

Federal Register 2010, 2011, 2012, 2013

...request from the Field Manager, El Centro Field Office, Bureau of Land Management, 1661 South 4th Street, El Centro, CA 92243 or via the Internet at...for public inspection at the BLM El Centro Field Office at the address...

2013-06-18

95

75 FR 45653 - Notice of Re-Opening of Comment Period for the Draft Imperial Sand Dunes Recreation Area...  

Federal Register 2010, 2011, 2012, 2013

... Mail: 1661 So. 4th St., El Centro, California 92243. Copies of the...Dunes RAMP/EIS are available in the El Centro Field Office at the above address...INFORMATION CONTACT: Tom Zale, BLM El Centro Field Office, 1661 S. 4th...

2010-08-03

96

Reconstruction of historical atmospheric deposition of DDT in the Zempoala Lagoon, in the center of Mexico [Reconstruccio??n de la deposicio??n atmosfe??rica histo??rica de DDT en la laguna de Zempoala en el centro de Me??xico  

USGS Publications Warehouse

Historical trend in deposition of DDT and its metabolites has been reconstructed by analyzing sediment cores of the Zempoala Lagoon, in the center of Mexico. The small watershed of this mountain lagoon is closed, and it is located between 2.800 and 3.700 masl. It is neither affected by agriculture nor by permanent populations. The Zempoala Lagoon has an average depth of 3.9 m and a maximum depth of 8.8 m. Sediments were extracted with a core sampler and analyzed by isotope methods (137Cs and 210Pb) for dating. Average sedimentation rate was determined in 0.129 g cm-2 yr1, corresponding to a maximum age of the 44 cm core of approximately 60 years. The first presence of total-DDT occurs in a depth between 28 and 32 cm of the sediment profile, corresponding to the 1960's, with a concentration of 5.3 ??g kg-1. The maximum concentration of total-DDT (13.0 ??g kg-1) occurs in sediment layers representing the late 1970's and beginning 1980's. More recently the concentration decreases towards the present concentration of 1.6 ??g kg-1. This concentration is below most DDT levels reported in recent sediment studies in the USA. The results indicate that the Zempoala Lagoon represents a natural recipient for studies of the reconstruction of historical trends of atmospheric contaminant deposition in this region. The limitations of the methodology applied, due to the influence of biodegradation on the definition of correct historical concentrations of DDT depositions, are demonstrated.

van, Afferden, M.; Hansen, A. M.; Fuller, C. C.

2005-01-01

97

Morphological and genetic comparative analyses of populations of Zoogoneticus quitzeoensis (Cyprinodontiformes:Goodeidae) from Central Mexico, with description of a new species Análisis comparativo morfológico y genético de diferentes poblaciones de Zoogoneticus quitzeoensis (Cyprinodontiformes:Goodeidae) del Centro de México, con la descripción de una especie nueva  

Microsoft Academic Search

A genetic and morphometric study of populations of Zoogoneticus quitzeoensis (Bean, 1898) from the Lerma and Ameca basins and Cuitzeo, Zacapu and Chapala Lakes in Central Mexico was conducted. For the genetic analysis, 7 populations were sampled and 2 monophyletic groups were identifi ed with a genetic difference of D HKY = 3.4% (3-3.8%), one being the populations from the

Domínguez-Domínguez Omar; Pérez-Rodríguez Rodolfo; Doadrio Ignacio

2008-01-01

98

Lo que el Aprendizaje para la Creatividad Exige a la Gestión Institucional en Centros Educativos: Aprendizajes Derivados de una Línea de Investigación 1 Demands From Required Conditions for Creative Development Over Institutional Management of Schools: Observed Characteristics That Emerge From more Than a Decade of Investigations  

Microsoft Academic Search

Creativity appears to be a human potential, but has specific requirements for its development and open expression. In fact, there are contexts that promote creativity and others that don't; these are contexts in which this ability is repressed, punished or ignored as an educational resource. This can be appreciate when people who don't consider themselves as creative persons are asked

Ma. Isidora Men; Ruby Vizcarra

2005-01-01

99

Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Bebes y "Toddlers": Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Infant/Toddler Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).  

ERIC Educational Resources Information Center

This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for caregivers working in center-based infant and toddler day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system. Part 2 explains…

Council for Early Childhood Professional Recognition, Washington, DC.

100

Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Ninos de Edad Pre-escolar: Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Preschool Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).  

ERIC Educational Resources Information Center

This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for preschool teachers or caregivers who work in center-based preschool day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system.…

Council for Early Childhood Professional Recognition, Washington, DC.

101

Doctor Edward L. Trimble  

Cancer.gov

En septiembre de 2011, el doctor Harold Varmus designó al doctor Edward Trimble director del nuevo Centro para la Salud Mundial (CGH) del NCI. El doctor Trimble cursó sus estudios de pregrado en el Harvard College y se graduó en medicina y salud pública en la Universidad John Hopkins. Se formó en obstetricia y ginecología en el Centro Médico de la Universidad Vanderbilt y luego en oncología ginecológica en el Centro Oncológico Memorial Sloan-Kettering.

102

Efectos colaterales de un reparto insostenible de recursos  

Microsoft Academic Search

El ser humano, como cualquier otro organismo, posee la capacidad de modificar su entorno para su propio beneficio, especialmente de cara a asegurar su manutención y la de aquellos a su cargo. Con el desarrollo tecnológico esa capacidad ha adquirido dimensiones sin precedentes para el entorno que nos sustenta, con consecuencias difíciles de estimar y menos aun de predecir, que

Marta I. Saloña Bordas

2006-01-01

103

La incidencia de las transferencias del gobierno en la distribucion de la renta en Estados Unidos: 1981-2000  

Microsoft Academic Search

El trabajo trata de evaluar la influencia redistributiva que han ejercido las transferencias públicas realizadas bajo las cinco administraciones que han gobernado en EE.UU. en el periodo 1980-2000. Tras repasar la literatura reciente sobre el tema, se definen dos conceptos de Renta Doméstica que permiten distinguir entre los Ingresos Propios y las transferencias aportadas por el gobierno. A continuación, se

E. Palazuelos

2004-01-01

104

Trois mesures de l'évolution de la rentabilité de 1966 à 1972  

Microsoft Academic Search

[spa] El definir la rentabilidad capitalistica noes cosa evidente de por sí. Puede relatar el beneficio bruto al capital fijo inmovilizado, lo cual encarrila a una noción de rendimiento económico de las inmovilizaciones. Desde el punto de vista fmanciero, es factibte interesarse a la rentabilidad de los unicos capitales invetidos por los accionistas de la empresa, orsea capitales propios. En

Edgard Cohen-Skalli

1974-01-01

105

Intrinsic measures of field entropy in cosmological particle creation  

NASA Astrophysics Data System (ADS)

Using the properties of quantum parametric oscillators, two quantities are identified which increase monotonically in time in the process of parametric amplification. The use of these quantities as possible measures of entropy generation in vacuum cosmological particle creation is suggested. These quantities which are of complementary nature are both related to the number of particles spontaneously created. Permanent address: Departamento de Termologia, Facultad de Ciencias, Universidad Autonoma de Barcelona, Ballaterra, Barcelona, Spain.

Hu, B. L.; Pavon, D.

1986-11-01

106

Casimir energies and special dimensions in a toy model for branes  

NASA Astrophysics Data System (ADS)

We consider a generalization to branes of the old action for the strings without reparamentrization invariance. These actions admit natural supplementary mass-shell conditions. By regularizing the Casimir energies we calculate the special dimensions at which these toy branes show vector massless states in its spectrum. They all turn out to be non-integers. On sabbatical leave from Departamento de Física, Facultad de Ciencias, Universidad Central de Venezuela, Apartado Postal 66961, Caracas 1061A, Venezuela.

Cohen, Isaac

1988-12-01

107

Reflexiones del Metodo de Investigacion, Consultoria e Innovacion en Sistemas de Gestion de Empresas Agropecuarias  

Microsoft Academic Search

The evolution of the subject of Research on Technology Transfer and Agroindustrial Development at the Facultad de Estudios Superiores Cuautitlán UNAM (School of Advanced Studies at Cuatitlan UNAM) converges with the generation of agricultural business management systems and with the consultancy service and training, as a University-Company articulation strategy; with the purpose of awakening business people's interests in order to

Jose Luis Ruiz Guzman; Alfredo Aguilar Valdes; Gerardo Gomez Gonzalez; Javier Ruiz Ledezma

2009-01-01

108

Geological control of earthquake induced landslide in El Salvador  

Microsoft Academic Search

Geological control of earthquake induced landslides in El Salvador. M., Tsige(1), I., Garcia-Flórez(1), R., Mateos(2) (1)Universidad Complutense de Madrid, Facultad de Geología, Madrid, Spain, (meaza@geo.ucm.es) (2)IGME, Mallorca El Salvador is located at one of the most seismically active areas en Central America, and suffered severe damage and loss of life in historical and recent earthquakes, as a consequence of earthquake

Meaza Tsige Aga

2010-01-01

109

78 FR 37845 - Meeting of the Imperial Sand Dunes Recreation Area (ISDRA) Subgroup of the California Desert...  

Federal Register 2010, 2011, 2012, 2013

...meet on Thursday, June 27, 2013, from 4 to 6 p.m. at the Bureau of Land Management (BLM) El Centro Field Office, 1661 S. 4th St., El Centro, CA 92243. The meeting will provide the public an opportunity to discuss the final ISDRA...

2013-06-24

110

Artificial Second Order Non-Linearity in Photonic Crystals.  

National Technical Information Service (NTIS)

We describe a technique for obtaining effective second order non- linearity X(sup 2) in non-centro-symmetric Photonic Crystal made from centro- symmetric materials (e.g., glass, Ge or Si). The effect is based on the electric quadrupole transition, strong ...

A. Feigel B. Sfez Z. Kotler

2002-01-01

111

Visual, real-time monitoring system for remote operation of electrical substations  

Microsoft Academic Search

CTEEP - Transmissao Paulista actually operates 105 substations geographically distributed across Sao Paulo State. These substations are remotely operated by two Operating Centers - Transmission Operating Center (COT Centro de Operacao da Transmissao), Bom Jardim SP, and Back-end Operating Center (COR - Centro de Operacao Retaguarda), Cabreiiva SP. Through the years, CTEEP has been deploying its high reliability and throughput

M. R. Bastos; M. S. L. Machado

2010-01-01

112

The Gran Telescopio Canarias and Calar Alto Virtual Observatory Compliant Archives  

NASA Astrophysics Data System (ADS)

The Gran Telescopio Canarias and Calar Alto archives are the result of the collaboration agreements between the Centro de Astrobiología and two entities: GRANTECAN S.A. and the Centro Astronómico Hispano Alemán (CAHA). The archives have been developed in the framework of the Spanish Virtual Observatory and are maintained by the Data Archive Unit at Centro de Astrobiología. The archives contain both raw and science ready data and have been designed in compliance with the standards defined by the International Virtual Observatory Alliance, which guarantees a high level of data accessibility and handling. In this paper we describe the main characteristics and functionalities of both archives.

Alacid, J. M.; Solano, E.; Esteban, F. J.; Velasco, A.

2014-05-01

113

Effects of Feeding Propionate and Calcium Salts of Long-Chain Fatty Acids on Transition Dairy Cow Performance  

Microsoft Academic Search

Multiparous Holstein cows (n = 40) were used in a randomized complete block design to determine the ef- fects of feeding Ca and Na salts (1:1, wt\\/wt) of propio- nate and Ca salts of long-chain fatty acids (LCFA) on transition cow performance. All cows were fed the same basal diet once daily for ad libitum intake. Treatments (g\\/d) were 320

J. M. DeFrain; A. R. Hippen; K. F. Kalscheur; R. S. Patton

2005-01-01

114

Una aplicación de la escala de fobia a los alimentos nuevos. El caso de los alimentos étnicos  

Microsoft Academic Search

RESUMEN: El artículo investiga las actitudes de los consumidores hacia los alimentos nuevos mediante la escala FNS (Food Neo-phobia Scale). A partir de ella se obtiene el perfil de los individuos más y menos proclives a la introducción de nuevos alimentos en sus dietas, denominados respectivamente, «neo-fíli- cos» y «neo-fóbicos». Entre estos alimentos nuevos, los étnicos o propios de un

Dena M. Camarena; Ana I. Sanjuán

115

Los ojos de la NASA sobre la Tierra  

NASA Video Gallery

La NASA cuenta con más de una decena de satélites que estudian la Tierra. Conoce la información que recaban los satélites, junto con Gilberto Colón, asistente especial del subdirector del Centro de...

116

77 FR 68738 - Procurement List; Additions  

Federal Register 2010, 2011, 2012, 2013

...Protection, Checkpoint 802, S-2 Hwy, MM 56.1, Ocotillo, CA. NPA: Imperial County Work Training Center, Inc., El Centro, CA. Contracting Activity: U.S. Customs and Border Protection, Border Enforcement Contracting Division,...

2012-11-16

117

75 FR 62417 - Draft Environmental Impact Statement for the Proposed Manzanita Band of Kumeyaay Indians Fee-to...  

Federal Register 2010, 2011, 2012, 2013

...public scoping meeting on March 27, 2008, at the County of Imperial's Board of Supervisors Chamber Room in the City of El Centro, California. From that scoping meeting, a range of project alternatives were developed and subsequently analyzed...

2010-10-08

118

77 FR 66181 - Procurement List; Additions  

Federal Register 2010, 2011, 2012, 2013

...US Border Patrol Checkpoint 808, I-8 Westbound 70.8 Mile Marker, Winterhaven, CA. NPA: ARC-Imperial Valley, El Centro, CA Contracting Activity: Dept of Homeland Security, U.S. Customs and Border Protection, Border Enforcement...

2012-11-02

119

77 FR 56813 - Procurement List, Proposed Additions  

Federal Register 2010, 2011, 2012, 2013

...Protection, Checkpoint 802, S-2 Hwy, MM 56.1, Ocotillo, CA. NPA: Imperial County Work Training Center, Inc., El Centro, CA. Contracting Activity: U.S. Customs and Border Protection, Border Enforcement Contracting Division,...

2012-09-14

120

77 FR 53179 - Procurement List; Proposed Additions  

Federal Register 2010, 2011, 2012, 2013

...Border Patrol Checkpoint 808, I-8 Westbound 70.8 Mile Marker, Winterhaven, CA. NPA: ARC-Imperial Valley, El Centro, CA. Contracting Activity: Dept of Homeland Security, U.S. Customs and Border Protection, Border Enforcement...

2012-08-31

121

77 FR 14592 - Additional Designations, Foreign Narcotics Kingpin Designation Act  

Federal Register 2010, 2011, 2012, 2013

...R.P. ZAGJ610813HSLMRS05 (Mexico) (individual) [SDNTK] Entities 2. ZARKA DE MEXICO S.A. DE C.V., Miguel Hidalgo No. 348 Pte., Colonia Centro, Donato Guerra y Carrasco, Culiacan, Sinaloa, Mexico; Folio Mercantil No....

2012-03-12

122

40 CFR 65.14 - Addresses.  

Code of Federal Regulations, 2010 CFR

...West Main Street, El Centro, California 92243. (xii) Kern County Air Pollution Control District, 1601 H Street, suite 250, Bakersfield, California 93301. (xiii) Kings County Air Pollution Control District,...

2009-07-01

123

40 CFR 65.14 - Addresses.  

Code of Federal Regulations, 2010 CFR

...West Main Street, El Centro, California 92243. (xii) Kern County Air Pollution Control District, 1601 H Street, suite 250, Bakersfield, California 93301. (xiii) Kings County Air Pollution Control District,...

2010-07-01

124

77 FR 19164 - Atlantic Highly Migratory Species; 2006 Consolidated Highly Migratory Species Fishery Management...  

Federal Register 2010, 2011, 2012, 2013

...USVI) St. Thomas, USVI, San Juan, Puerto Rico (PR), Ponce, PR, and Mayaguez, PR, in order to provide greater opportunity...Las Americas, Agricola. Ste. 208, Centro Gubernamental, Ponce, PR 00717-2111. May 10,...

2012-03-30

125

Resultados preliminares sobre a implantacao de laboratorio para a medida do radiocarbono natural. (Preliminary results on the implantation of a laboratory for the measurement of natural radiocarbon).  

National Technical Information Service (NTIS)

Though the project 'Amazonia I', activity 'Paleoclimatology', sub-project 'hydrologic cycle', the Centro de Energia Nuclear da Agricultura (CENA) from Universidade de Sao Paulo has received recently, from Atomic Energy International Agency a research appa...

C. L. R. Pessenda R. Pessenda V. F. Nascimento Filho R. L. Victoria E. Matsui

1990-01-01

126

Rural Health Services at Seguridad Social Campesino Facilities: Analyses of Facility and Household Surveys. Technical Report No. 13.  

National Technical Information Service (NTIS)

The Health Financing and Sustainability (HFS) Project and the Centro de Estudios y Dates (CEDATOS) conducted an assessment of the health services of Ecuadors Seguro Social Cumpesino (SSC), a government social insurance program providing health care and ot...

D. DeRoeck J. Knowles T. Wittenberg L. Raney P. Cordova

1996-01-01

127

77 FR 30590 - Unblocking of Specially Designated Nationals and Blocked Persons Pursuant to the Foreign...  

Federal Register 2010, 2011, 2012, 2013

...RENTA CAMPEROS URABA LTDA., Apartado, Antioquia, Colombia; c/o VIGILAR COLOMBIA LTDA., Apartado, Antioquia, Colombia; c/o CENTRO DE DIAGNOSTICO...AUTOMOTRIZ EJE BANANERO S.A., Apartado, Antioquia, Colombia; c/o REPUESTOS EL...

2012-05-23

128

Cell Therapy: Filling the Gap Between Basic Science and Clinical Trials. First International Workshop held in Rome, Italy on October 15-17, 2001.  

National Technical Information Service (NTIS)

The Istituto Superiore di Sanita, in collaboration with the Istituto Dermatopatico dell'Immacolata (Rome), the Istituto Nazionale Ricerca sul Cancro-Centro Biotecnologie Avanzate (Genoa) and the University G. D'Annunzio (Chieti), has organized this intern...

A. R. Migliaccio C. Carta S. Campisi

2001-01-01

129

SOLAR PHOTOVOLTAIC AND WASTEWATER TREATMENT SYSTEMS DESIGN FOR COMMUNITIES IN PANAM&AACUTE;  

EPA Science Inventory

In collaboration with the Panamanian non-governmental organization Centro de Estudios y Acción Social Panameño (CEASPA), the Northwestern University chapter of Engineers for a Sustainable World (ESW-NU) has been working with the rural ranching community of San...

130

Recursos en su comunidad  

Cancer.gov

Información acerca de las organizaciones que proporcionan apoyo a personas con cáncer. También incluye recursos disponibles en la comunidad, como doctores, centros de tratamiento y otros profesionales de salud.

131

75 FR 34214 - Additional Designations, Foreign Narcotics Kingpin Designation Act  

Federal Register 2010, 2011, 2012, 2013

...Iguala Numero 74, Colonia Libertad, Nueva Italia, Michoac[aacute]n, Mexico; Calle...123 Numero 103, Colonia Centro, Nueva Italia, Michoac[aacute]n, Mexico; Avenida...Esquina Con Lazaro Cardenas Norte, Nueva Italia, Michoac[aacute]n, Mexico;...

2010-06-16

132

Construction of a Self-Powered Neutron Detector Prototype.  

National Technical Information Service (NTIS)

Description and testing of a self-powered neutron detector and related current measurement electronics, in construction at Centro de Desenvolviemnto da Tecnologia Nuclear (CDTN), are presented. The cylindrical detector has a 9-wire cobalt emitter, Inconel...

J. B. S. M. Pombo R. F. Correa

1986-01-01

133

MODELAGEM MATEMÁTICA DOS NÍVEIS D'ÁGUA NO RIO ARAGUAIA  

Microsoft Academic Search

Resumo - Este trabalho é pioneiro para a região Centro-Oeste do Brasil e visa ao aprofundamento da problemática do aproveitamento do Rio Araguaia como via navegável para transportar as safras de grãos das regiões Centro-Norte. O Programa de Desenvolvimento da Hidrovia Tocantins- Araguaia é uma iniciativa do Ministério dos Transportes para estabelecer a navegação fluvial confiável e segura em 2.242

Rone Antônio de Azevedo

134

Percepcion de los profesores universitarios acerca del concepto cultura cientifica y de sus implicaciones en el nuevo bachillerato del Recinto de Rio Piedras de la Universidad de Puerto Rico  

NASA Astrophysics Data System (ADS)

El Senado Academico del Recinto de Rio Piedras de la Universidad de Puerto Rico aprobo en el ano academico 2005-2006 la Certificacion 46, que contiene los lineamientos de un nuevo bachillerato. Este nuevo bachillerato introdujo cambios significativos en el curriculo tradicional. Entre ellos se encuentra la reduccion del componente de educacion general y el de Ciencias Biologicas en particular. La reduccion de creditos en el componente de Ciencias Biologicas ha obligado a reevaluar el concepto de cultura cientifica que desarrollan esos cursos. El proposito del estudio consistio en auscultar las percepciones de los profesores de las Facultades de Administracion de Empresas, Humanidades, Ciencias Sociales, Ciencias Naturales, Educacion y Estudios Generales del Recinto de Rio Piedras de la Universidad de Puerto Rico en torno al concepto de cultura cientifica, los contenidos disciplinares del curso de Ciencias Biologicas y la reduccion de creditos en el nuevo bachillerato. Las preguntas que guiaron la investigacion fueron: ¿cuales son las percepciones que tienen los profesores de las Facultades de Administracion de Empresas, Ciencias Sociales, Estudios Generales, Ciencias Naturales, Humanidades y Educacion, en torno al concepto de cultura cientifica y los contenidos disciplinares del curso de Ciencias Biologicas? ¿cuales son las percepciones que tienen los profesores de Ciencias Biologicas en torno al concepto cultura cientifica y los contenidos disciplinares del curso de Ciencias Biologicas? ¿existen diferencias significativas por facultad, genero, experiencia, rango y nombramiento en las percepciones que tienen los profesores del Recinto de Rio Piedras de la Universidad de Puerto Rico sobre los elementos que caracterizan la cultura cientifica y los contenidos biologicos que deben tener los egresados del Recinto? ¿que implicaciones curriculares tienen estos testimonios en el desarrollo del concepto de cultura cientifica en el nuevo bachillerato? Para realizar la investigacion se utilizo una metodologia cuantitativa y la herramienta para lograrlo fue una encuesta. La encuesta se analizo estadisticamente mediante analisis de frecuencias y por cientos, prueba ANOVA, prueba t, pruebas Post Hoc de Tukey y de Levene. Tambien se realizo nuevamente una prueba de confiabilidad mediante el alfa de Cronbach. Los resultados reflejaron que los profesores de las Facultades de Administracion de Empresas, Ciencias Sociales, Ciencias Naturales, Educacion, Humanidades, Estudios Generales y el Departamento de Ciencias Biologicas tienen una percepcion muy positiva del concepto de cultura cientifica, los contenidos curriculares de Ciencias Biologicas y del nuevo bachillerato.

Ramos Pastrana, Nilsa

135

On the width of ? hypernuclei and ?- atoms  

NASA Astrophysics Data System (ADS)

The self-energy of a ? particle in symmetric nuclear matter is investigated by using a boson exchange model for the ?N interaction. The imaginary part of the self-energy is shown to be strongly density dependent and has saturation properties around ? ? 0.7 ?o. This peculiar feature allows our results to be in good agreement with the ? atom data while simultaneously providing a width of about 5 Mev or smaller for all nuclei and different states. Permanent address: Departamento de Física Atómica y Nuclear, Facultad de Ciencias, Universidad de Salamanca, Salamanca, Spain.

Brockmann, R.; Oset, E.

1982-12-01

136

PREFACE: International Symposium on Ultrasound in the Control of Industrial Processes (UCIP 2012)  

NASA Astrophysics Data System (ADS)

The following describes most of the presentations (both oral and poster) given at the International Symposium of Ultrasound in the Control of Industrial Processes (UCIP 2012) celebrated in Madrid between 18 and 20 April 2012. This event was intended to be a meeting point for scientists, engineers and professionals from all over the world in the field of ultrasonics applied to the characterization and control of materials and processes in the industry. More precisely, the topics included were: 1. Novel applications of ultrasound in the industry (including high-power ultrasound) Food science Biotechnology and microbiology Pharmaceutics and cosmetics Petrochemistry and civil engineering 2. New insights in the ultrasonic characterization of media: Fluids and emulsions Nano- and micro-particle dispersions Soft materials Porous bodies and inhomogeneous materials 3. New developments in ultrasonic measuring techniques: Acoustic microscopy Piezoelectric sensors Ultrasonic imaging Signal processing The symposium was organized by the Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND, UPM-CSIC) in collaboration with the Universidad Politécnica de Cataluña, the Universidad Politécnica de Valencia and the University of Leeds. During the conference, 32 posters and 33 oral communications were presented. In addition, 4 invited lectures were imparted: 'Acoustic microscopy, spectroscopy and nanoparticle detection' by Dr Malcolm Povey; 'Acoustic and electroacoustic spectroscopy' by Dr Andrei Dukhin; 'High-Resolution Ultrasonic Spectroscopy and its application for material analysis by Dr Vitaly Buckin; 'Ultrasonic sensors for process applications - state of the art' by Dr Bern Henning; and three tutorials were given: 'PZFlex - Finite Element Analysis for Virtual Prototyping' by Weidlinger Associates; 'SITAU - A flexible architecture controlled by MATLAB for the development of ultrasonic applications' by DASEL; 'Ultra-SCATTERERTM (Acoustics Suite) - The R&D Tool for Multiple Scattering of Generic Waves in Particulate Composites' by Félix Alba Consulting. A total of 93 delegates from 21 countries participated actively in this event, and more than ten companies were involved through oral communications, tutorials, exhibition or sponsorship. Conference photograph Conference photograph Organizers Organizers SCIENTIFIC COMMITTEE Dr Luis Elvira, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dr Pablo Resa, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dr Oscar F Martinez-Graullera Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dr Jordi Salazar Department of Electronic Engineering Universitat Politècnica de Catalunya, Spain Dr Jose Benedito Universitat Politècnica de València, Spain ORGANIZING COMMITTEE Dr Luis Elvira, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Prof Malcolm J W Povey, Procter Department of Food Science University of Leeds, United Kingdom Dr Jordi Salazar, Department of Electronic Engineering Universitat Politècnica de Catalunya, Spain Dr Jose Benedito, Universitat Politècnica de València, Spain Dr Oscar F Martinez-Graullera, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Carmen Duran, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dr Pablo Resa, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dra Cristina Aparicio, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Prof Francisco Montero de Espinosa, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Jaime Rodríguez-López, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Dr Carlos Sierra, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Shiva Kant Shukla, Centro de Acústica Aplicada y Evaluación No Destructiva (CAEND), UPM-CSIC, Spain Pedro Castro Blazquez, Centro de Ac

Segura, Luis Elvira; Resa López, Pablo; Salazar, Jordi; Benedito Fort, José Javier; Martínez Graullera, Óscar

2012-12-01

137

órbitas regulares y caóticas en modelos autoconsistentes de satélites galácticos  

NASA Astrophysics Data System (ADS)

En un trabajo anterior mostramos que el caos podía ser significativo en satélites galácticos. Ahora hemos clasificado órbitas en modelos de Heggie-Ramamani que tienen la ventaja de ser autoconsistentes y de que se conoce su función de distribución. Hemos podido así determinar porcentajes de órbitas caóticas, que resultan ser de entre 25% y 65%, según el modelo considerado. La dependencia de la caoticidad con la energía orbital es complicada y sugiere que el origen de la caoticidad se halla en la acción combinada de la fuerza de atracción del propio satélite con la fuerza de Coriolis y la fuerza centrifuga.

Muzzio, J. C.; Carpintero, D. D.; Wachlin, F. C.

138

rac-1-(5-Bromo-2-hy-droxy-phen-yl)-1-oxopropan-2-yl morpholine-4-carbo-dithio-ate  

PubMed Central

In the racemic title compound, C14H16BrNO3S2, synthesized from the corresponding ?-bromo­propio­phenone, the dihedral angle between the plane of the phenol group and that of the planar section [maximum deviation = 0.040?(2)?Å] of the morpholine-4-carbodi­thiol­ate moiety is 76.36?(10)°. A strong intra­molecular phenol O—H?O hydrogen bond if present in the mol­ecule. In the crystal, only weak C—H?S and C—H?O inter­actions are found.

Sarbu, Laura G.; Hrib, Cristian G.; Birsa, Lucian M.

2013-01-01

139

The Gran Telescopio Canarias and Calar Alto Virtual Observatory compliant archives  

NASA Astrophysics Data System (ADS)

The Gran Telescopio Canarias (GTC) and Calar Alto archives are the result of the collaboration agreements between the Centro de Astrobiología (CAB, INTA-CSIC)) and two entities: GRANTECAN S.A. and the Centro Astronómico Hispano Alemán (CAHA). The archives have been developed in the framework of the Spanish Virtual Observatory and are maintained by the Data Archive Unit at CAB. The archives contain both raw and science ready data and have been designed in compliance with the standards defined by the International Virtual Observatory Alliance (IVOA) which guarantees a high level of data accessibility and handling. In this paper we describe the main characteristics and functionalities of both archives.

Solano, Enrique; Gutiérrez, Raúl; Alacid, José Manuel; Jiménez-Esteban, Francisco; Velasco Trasmonte, Almudena

2012-09-01

140

New algorithms for phase unwrapping: implementation and testing  

NASA Astrophysics Data System (ADS)

In this paper it is shown how the regularization theory was used for the new noise immune algorithm for phase unwrapping. The algorithm were developed by M. Servin, J.L. Marroquin and F.J. Cuevas in Centro de Investigaciones en Optica A.C. and Centro de Investigacion en Matematicas A.C. in Mexico. The theory was presented. The objective of the work was to implement the algorithm into the software able to perform the off-line unwrapping on the fringe pattern. The algorithms are present as well as the result and also the software developed for the implementation.

Kotlicki, Krzysztof

1998-11-01

141

Application of E-learning tools for the teaching of Natural Science. A case related to Astronomy  

NASA Astrophysics Data System (ADS)

The requirements, recent experiences and projections of the application of virtual learning techniques and environments for the teaching of basic sciences at the National University of Córdoba, Argentina, are described. The reasons to still consider basic science E-learning as an institutional vacancy area are discussed. Present activities designed to revert this situation are also discussed. A particular experience about the application of tics as a complementary resource for teaching astronomy at the University is described and discussed on the basis of both strengths and limitations. The organization of E-learning activities at the Faculty of Engineering, Biology and Geology ("Facultad de Ciencias Exactas, Físicas y Naturales") is discussed in some detail.

Goldes, G.; Gallino, M.; Britos, D.; Lago, D.; Tavella, G.; Vidal, E.; Morales, S.; Nicotra, M.

142

Archive for the history of psychology in Spain: The Archivo Histórico, Bibliográfico y Documental de Psicología of the Universidad Autónoma de Madrid.  

PubMed

In this article, we describe the content, sources, and history of the Archivo Histórico de la Facultad de Psicología (the Historical Archive for the History of Psychology) at the Universidad Autónoma de Madrid (UAM, Spain). This archive is the result of the task carried out by some professors of the Faculty of Psychology at UAM for the preservation and increase of sources for a history of psychology in Spain. Collections from the 19th to the 20th century were recovered because of the UAM effort and some other contributions. Most of the sources for a history of psychology in the Spanish context were unknown and nearly lost before Faculty of Psychology's task. Among other projects, UAM archive is acquiring classical texts of psychology by buying facsimiles from different publishing houses and, what is more relevant, they guarantee access to the sources for research purposes. (PsycINFO Database Record (c) 2012 APA, all rights reserved). PMID:23397924

Quintana, José; Sáiz, Milagros; Balltondre, Mónica; Sáiz, Dolors

2012-11-01

143

[Distribution of butterflies (Lepidoptera: Hesperioidea and Papilionoidea) from Mexico State, Mexico].  

PubMed

The State of Mexico is a region with great biological diversity, owing to its geographical and ecological features. Regarding Hesperioidea and Papilionoidea, 15% of the Mexican species are recorded in the State of Mexico, 17% of which are endemic to the country. A checklist of the two superfamilies for the State of Mexico was integrated, based on published literature and databases at the Museo de Zoología of the Facultad de Ciencias, UNAM. The checklist is composed by six families, 22 subfamilies, 197 genera and 325 species (95 Hesperiidae, 19 Papilionidae, 35 Pieridae, 54 Lycaenidae, 20 Riodinidae, and 102 Nymphalidae). A list of each species is presented, including collecting localities, flight month, and whether data correspond to scientific collection records or literature. PMID:19419047

Hernández-Mejía, Claudia; Vargas-Fernández, Isabel; Luis-Martínez, Armando; Llorente-Bousquets, Jorge

2008-09-01

144

Fronts and Thermohaline Structure of the Brazil Current Confluence System  

NASA Astrophysics Data System (ADS)

and Thermohaline Structure of the Brazil Current Confluence System (BCCS) are stud-ied from climatic data, "Marathon Exp. Leg.8, 1984"data, and two Sea surface temperature (SST) data bases: "Meteor satellite"(1989-1994) and "ds277-Reynolds" (1981-2000).The South Atlantic Central Water (SACW) is divided in two main types: tropical (TW) and subtropical water (ST). Water masses, fronts, inter-frontal and frontal zones are analysed and classified: a) the water masses: Tropical Low-Salinity Water, Tropical Surface Water, Tropical Tropospheric Water, Subtropical Low-Salinity Water, Subtropical Surface Water, Subtropical Tropospheric Water. T,S characteristics of intermediate, deep and bottom water defined by different authors are confirmed and completed; b) the Inter-frontal Zones: Tropical/Brazil Current Zone, Sub-tropical Zone and Subantarctic Zone; c) the Frontal Zones: Subtropical, Subantarctic and Polar, and d) the Fronts: Subtropical Front of the Brazil Current, Principal Subtropical Front, North Subtropical Front, Subtropical Surface Front, South Subtropical Front, Subantarctic Surface Front, Subantarctic Front and Polar Front. Several stable T-S relationships are found below the friction layer and at the Fronts. The maximum gradient of the oceanographic characteris-tics occurs at the Brazil Current Front, which can be any of the subtropical fronts, depending on season. Minimum mean depth of the pycnocline coincides with the fronts of the BCCS, indicating the paths of low-salinity shelf waters into the open ocean. D. N. Severov (a) , V. Pshennikov (b) and A.V. Remeslo (c) a -Sección Oceanologé Facultad de Ciencia, Universidad de la Republica, Igué 4225, 11400 ?a, a Montevideo, Uruguay. Tel. (598-2) 525-8618, Fax (598-2) 525-8617, mail: dima@fcien.edu.uy b -Instituto de Física, Facultad de Ciencias, Universidad de la Republica, Igué 4225, 11400 Mon-a tevideo, Uruguay, mail: seva@fisica.edu.uy c -Atlantic Research Inst. For Fisheries Oceanology (Atlant/NIRO), Kaliningrad, Russia

Severov, Dimitri

145

Nonlinear restoring force estimation in civil structures using a high gain observer  

Microsoft Academic Search

Strong ground motions may cause damage to structural elements by cracking or yielding. Hysteresis cycles are a measure of this damage. The present paper uses a class of integral high gain observers to estimate the unknown nonlinear restoring force of a single-degree-of-freedom structure. Simulations are carried out using the Mexico City at SCT (1985) and the El Centro (1940) time

R. Garrido; F. J. Rivero-Angeles; R. Martinez-Guerra; B. Gomez-Gonzalez; J. C. Martinez-Garcia

2004-01-01

146

La pizarra digital y sus posibilidades en el mundo educativo  

Microsoft Academic Search

Nuevos aprendizajes y nuevas mentes, llevan consigo la necesidad de profundizar en la metodología a la hora de innovar y de aplicar las nuevas tecnologías en el aula. La inquietud de un grupo cada vez más numeroso de profesores, junto a las tímidas aproximaciones de las diversas administraciones a la hora de dotar a los centros con nuevas tecnologías, hace

Ramón Domenech

2007-01-01

147

In vitro gas production as a method to compare fermentation characteristics of steam-flaked corn  

Microsoft Academic Search

An in vitro gas production technique was used to determine differences in starch availability that occurred with steam flaking of corn among eight feed mills (MILL) in California. Whole corn (WC) and steam-flaked corn (SFC) grain samples were obtained from six commercial mills and two mills at the University of California (Davis and El Centro, CA). The WC sample was

E. J DePeters; G Getachew; J. G Fadel; R. A Zinn; S. J Taylor; J. W Pareas; R. G Hinders; M. S Aseltine

2003-01-01

148

EDAD AVANZADA Y FACTORES DE RIESGO PARA INFARTO AGUDO DE MIOCARDIO  

Microsoft Academic Search

Resumen Este estudio caso-control analizó en los sujetos añosos el rol de los factores de riesgo coronario en el desarrollo del infarto agudo de miocardio (IAM), estableció la naturaleza de esta asociación y el gra- do de riesgo. Los datos fueron obtenidos en una investigación que incluyó 1060 casos y 1071 controles, realizada en 35 unidades coronarias de centros médicos

MARIO A. CIRUZZI; HERMAN SCHARGROSKY; PALMIRA PRAMPARO; JORGE ROSLOZNIK; HORACIO ZYLBERSZTEJN; MONICA HAQUIM; VIVIANA RUDICH; ALBERTO CACCAVO; DANIEL PISKORZ

149

Comparison of CPTEC GCM and Eta Model Results with Observational Data from the Rondonia LBA Reference Site, Brazil  

Microsoft Academic Search

We compared forecasts of the Center for Weather Prediction and Climate Studies (Centro de Previsão de Tempo e Estudos Clim´ticos—CPTEC) General Circulation Model (GCM) and the mesoscale Eta Model with observations undertaken at the Rondonia Coordinated Enhanced Observing Period (CEOP) reference site, Brazil, for the dry period between 1 July and 1 September 2001. The Rondonia site is located in

Sin Chan CHOU; José A. MARENGO; Claudine P. DERECZYNSKI; Patricia V. WALDHEIM; Antonio O. MANZI

2007-01-01

150

Disappearing in the Houdini Education: The Experience of Race and Invisibility among Latina/o Students  

ERIC Educational Resources Information Center

This article examined Latina/o students' experiences of racism at El Centro High. Many felt that negative relationships with school personnel were deleterious to their education. These relationships had grown from teachers' and administrators' ideological assumptions of Latina/o students' racial inferiority. These assumptions had stemmed from two…

Cammarota, Julio

2006-01-01

151

Entrance into Registered Nursing--Issues and Problems.  

ERIC Educational Resources Information Center

Following a description of the facilities, programs, and students of El Centro College (Texas), this paper reviews the conflicts arising between the mandates of external certifying boards, the expectations of hospital administrators and other medical personnel, and the realities of community college philosophy, planning, staffing and budgeting for…

Herd, Ruby H.

152

Imperial County Services Building: Occupant Behavior and Operational Consequences as a Result of the 1979 Imperial Valley Earthquake.  

National Technical Information Service (NTIS)

Results are presented of a study of two issues: (1) occupant behavior in the Imperial County Services Building in El Centro, California, at the time of an earthquake; and (2) the relocation process for the county agencies that were forced to move from the...

C. Arnold D. Whitaker M. Durkin R. Eisner

1982-01-01

153

Closing the Gap: Merging Student Affairs, Advising and Registration  

ERIC Educational Resources Information Center

In a pilot study at El Centro College, an urban college in the Dallas County Community College District, students in a new-to-college educational framework class were offered an intervention intended to enhance the academic advising process. The intervention consisted of in-class career services advising, degree selection, degree planning, course…

Goomas, David T.

2012-01-01

154

In-Course Instructor-Guided Service Learning in a Community College General Psychology Class  

ERIC Educational Resources Information Center

Students enrolled in two general psychology classes at El Centro College (ECC) of the Dallas County Community College District (DCCCD) were offered the opportunity to earn extra credit by performing up to 20 hours of service learning. Benefits of service learning were observed in student development, including exploration of career possibilities,…

Goomas, David T.; Weston, Melissa B.

2012-01-01

155

75 FR 11557 - Meeting of the California Desert District Advisory Council  

Federal Register 2010, 2011, 2012, 2013

...formal session on Saturday, March 27, 2010, from 8 a.m. to 4:30 p.m. at Cal Works Building, 2895 S. 4th St., El Centro, CA 92243. Agenda topics will include updates by Council members and reports from the BLM District Manager and...

2010-03-11

156

Geothermal district heating systems  

NASA Astrophysics Data System (ADS)

Ten district heating demonstration projects and their present status are described. The projects are Klamath County YMCA, Susanville District Heating, Klamath Falls District Heating, Reno Salem Plaza Condominium, El Centro Community Center Heating/Cooling, Haakon School and Business District Heating, St. Mary's Hospital, Diamond Ring Ranch, Pagosa Springs District Heating, and Boise District Heating.

Budney, G. S.; Childs, F.

1982-06-01

157

Helping Disadvantaged Children Succeed.  

ERIC Educational Resources Information Center

Describes how two low-achieving, high-poverty school districts raised the test scores of their students. The El Centro school district's inquiry-science approach raised elementary science test scores, as well as mathematics and reading scores. Twin Falls improved test scores by adopting the Standardized Timed Curriculum, which involved components…

Jorgenson, Olaf; Smith, Steven H.

2002-01-01

158

Meeting the Needs of Future Hispanic Educational Leaders.  

ERIC Educational Resources Information Center

Describes a graduate program in school leadership at Northeastern Illinois University that is intended to meet the administrative and leadership needs of Hispanic teachers in Chicago. The master's degree program is offered as part of the university's El Centro outreach center for the Hispanic-American community and offers collaborative…

Serafin, Ana Gil

1999-01-01

159

ELIMINATE TABOOS, OUTFIT YOUR LIBRARY IN SIX MONTHS.  

ERIC Educational Resources Information Center

DURING A 6-MONTH PERIOD, EL CENTRO JUNIOR COLLEGE, DALLAS, TEXAS, ESTABLISHED A LEARNING RESOURCES LIBRARY FOR A 2,000-STUDENT POPULATION IN A FORMER DEPARTMENT STORE. THE TASK INCLUDED THREE GROUPS OF ACTIVITIES--(1) FACILITY PLANNING AND OBTAINING FURNITURE AND EQUIPMENT, (2) ACQUISITION AND PROCESSING OF A BASIC COLLECTION, INCLUDING PRINTED…

NEWMAN, MAYRELEE

160

Technology Usage among Community College Faculty in First-Time-in-College Classes: A Call to Standardization  

ERIC Educational Resources Information Center

Technology in higher education has played an increasingly dramatic role, particularly on community college campuses, with emphasis on how to provide better services to students via the use of technology. This report examines the challenge for faculty teaching first-time-in-college (FTIC) classes at El Centro College of the Dallas County Community…

Goomas, David T.

2013-01-01

161

World Perspective Case Descriptions on Educational Programs for Adults: Chile.  

ERIC Educational Resources Information Center

This document contains two case studies of adult education programs in Chile. Both case studies begin with a "face sheet" on which is recorded basic information about the program and the description. The first case study, prepared by Patricio Donoso, reports on Centro El Canelo de Nos, an inservice center for educators who work with Chile's most…

Donoso, Patricio; Gajardo, Marcela

162

77 FR 65905 - Meeting of the California Desert District Advisory Council  

Federal Register 2010, 2011, 2012, 2013

...formal session on Saturday, December 1, 2012, from 8 a.m. to 4:30 p.m. at the Cal Works Bldg., 2895 S 4th St, El Centro, CA 92243. There also will be a field trip on Friday, November 30, from 8 a.m. to 4:30 p.m. on...

2012-10-31

163

The College Fact Book: Academic Year 2000-2001.  

ERIC Educational Resources Information Center

This comprehensive fact book is part of the institutional effectiveness effort at El Centro College in Texas. It provides extensive information on students, graduation, performance measures, continuing education, faculty, and finances. Report highlights (for fall 2000, unless noted otherwise) include: (1) unduplicated headcount was 4,227; (2)…

El Centro Coll., Dallas, TX.

164

Outreach to Future Hispanic Educational Leaders.  

ERIC Educational Resources Information Center

This paper discusses issues related to the recruitment of Hispanic-American educational leaders, focusing on the El Centro de Recursos Educativos outreach center at Northeastern Illinois University in Chicago, which began operation in Fall 1997. It examines the characteristics of successful programs for Hispanic recruitment and retention and the…

Serafin, Ana Gil

165

Survey of Student Rights, Freedoms and Involvements.  

ERIC Educational Resources Information Center

A survey questionnaire designed to determine whether faculty, students, and administrators were aware of the policies governing student rights, freedoms, and involvements at their college was responded to by 143 students and 142 faculty members from El Centro Junior College in Texas and Santa Fe Junior College in Florida. Data showed that there is…

Bromley, Ann

166

76 FR 62440 - Final Environmental Impact Statement for the Manzanita Band of Kumeyaay Indians Fee-to-Trust...  

Federal Register 2010, 2011, 2012, 2013

...held a public scoping meeting on March 27, 2008, at the County of Imperial's Board of Supervisors Chamber Room in El Centro, California. An NOA for the Draft EIS (DEIS) was published in the Federal Register on October 8, 2010 (75 FR...

2011-10-07

167

Luminous flux and correlated color temperature determination for LED sources  

Microsoft Academic Search

Recently, Light Emitting Diodes (LEDs) have found several applications from lighting to automotive displays, screens, traffic signaling and many other. These emerging applications require some of their visual quality characteristics to be measured as accurately as possible in an objective physical manner. Therefore the Photometry Laboratory and the Sources Spectroradiometry Laboratory of the Centro Nacional de Metrologia (CENAM) of Mexico

A. Estrada-Hernández; L. P. González-Galván; H. Zárate-Hernández; R. Cardoso; E. Rosas

2007-01-01

168

Aplicação do Método de Monte Carlo, GEANT 4 e SRIM 2003 no Projeto de um Tomógrafo por Feixe Prótons de Baixa Energia  

Microsoft Academic Search

Resumo - A radioterapia por feixe de prótons é uma alternativa altamente eficiente no tratamento do câncer. Atualmente, nos centros de tratamento por prótons, o cálculo de dose é baseada em imagens de tomografia computadorizadas de raio-x (CT) e o paciente é posicionado com auxílio de radiografias de raio-x. A alternativa proposta é a utilização da tomografia por feixe de

J. A. P. Setti; E. Milhoretto; S. R. Junior; H. R. Schelin; M. C. L. Klock; V. Denyak; R. Rocha; I. Evseev; O. Yevseyeva

169

Lamellar bodies as a diagnostic test of fetal lung maturity  

Microsoft Academic Search

Objectives: To determine the number of lamellar bodies in the amniotic fluid indicating fetal lung maturity and to define the effectiveness of a diagnostic test in a healthy pregnant population. Methods: The study took place at the Hospital General de Zona #16 Centro Médico Nacional del Instituto Mexicano del Seguro Social. Torreón, Coahuila, México, where 264 pregnant women were followed-up

J. Roiz-Hernández; E. Navarro-Solis; E. Carreón-Valdéz

2002-01-01

170

Fomento de la investigación del cáncer en América Latina  

Cancer.gov

La Oficina para el Desarrollo de Programas de Cáncer en América Latina (OLACPD), fruto de una alianza innovadora entre el Instituto Nacional del Cáncer (NCI) y el Centro Internacional Fogarty (FIC), fue creada en reconocimiento de la oportunidad de apoyar y mejorar la investigación y el tratamiento del cáncer en América Latina.

171

GIS and Associated Database for the Italian Stranding Network. A cooperative Project Based on GIS Technologies.  

National Technical Information Service (NTIS)

The 'Centro Studi Cetacei' (CSC) is a research group established in 1985 at the Natural History Museum of Milan as part of the Italian Society for Natural Sciences. One of the most important projects of CSC was to create a national network (Italian Strand...

G. Pavan M. Podesta A. D'Amico N. Portunato C. Fossati

2001-01-01

172

Puerto Ricans and Higher Education Policies. Volume 1: Issues of Scholarship, Fiscal Policies and Admissions. Higher Education Task Force Discussion Series.  

ERIC Educational Resources Information Center

This volume explores issues of scholarship, fiscal policies, and admissions in the higher education of Puerto Ricans, with the emphasis on Puerto Ricans on the U.S. mainland and a particular focus on Puerto Rican admissions to the City University of New York. The first paper, "The Centro's Models of Scholarship: Present Challenges to Twenty Years…

Rodriguez, Camille, Ed.; Bosque-Perez, Ramon, Ed.

173

Integrable deformations of affine surfaces via the Nizhnik-Veselov-Novikov equation  

NASA Astrophysics Data System (ADS)

It is shown that deformations of affine conormal according to the Nizhnik-Veselov-Novikov equation generate, via the Lelieuvre's formula, integrable deformations of affine surfaces. The total affine mean curvature is preserved by these deformations. It is shown that a stationary point of these deformations for centro-affine surfaces is given by the proper affine sphere.

Konopelchenko, B. G.; Pinkall, U.

1998-08-01

174

Boletín del Instituto Nacional del Cáncer - 01-05-2010  

Cancer.gov

Al caminar por los pasillos del nuevo centro oncológico integral en la sede de Ciencias Médicas de la Universidad de Puerto Rico (UPR) en San Juan, uno debe mantener los ojos abiertos. La mujer que pasa caminando vigorosamente podría ser la doctora Marcia Roxana Cruz-Correa, y no debe uno perderse la oportunidad de conocerla.

175

Sobre el principio y posterior hegemonía económico-política y militar de EE.UU tras la Segunda Guerra Mundial  

Microsoft Academic Search

Las principales tendencias de desarrollo económico y social dentro de la estructura del capitalismo moderno se expresan en EE.UU de la forma más preponderante. La posición político-militar del gigante americano lo transforma en el centro neurálgico del imperialismo mundial, al liderar el bloque del Atlántico Norte, y al llevar a cabo una política de reacción contra las fuerzas de Movimiento

José Antonio Ascanio Barrio

2011-01-01

176

ERUPCIÓN DEL VOLCÁN HUDSON Y CRISIS GANADERA EN LA MESETA CENTRAL SANTACRUCEÑA, PATAGONIA ARGENTINA  

Microsoft Academic Search

El sector ovino-extensivo de la Meseta Central Santacruceña, extensa región ecológica del centro-Norte de la provincia de Santa Cruz (Patagonia Argentina), en las últimas décadas atraviesa una situación de crisis, evidenciada en el escaso porcentaje de parcelas que mantienen el uso del suelo tradicional. Las interpretaciones con respecto a las causas de la crisis no son muy numerosas, en la

Alberto Vazquez

2012-01-01

177

Radar cross section measurements (8-12 GHz) of flat plates painted with microwave absorbing materials  

Microsoft Academic Search

The aim of the present work is to present radar cross section measurements of flat plates painted with radar absorbing material (RAM) in the range of 8-12 GHz. The measurements were carried out in an anechoic chamber at Centro Tecnico Aeroespacial (CTA)-Ministerio da Defesa facilities, and the RAM coating was manufactured at Divisao de Materiais of Instituto de Aeronautica e

M. C. Rezende; I. M. Martin; M. A. S. Miacci; E. L. Nohara

2001-01-01

178

Sexual Abuse Experiences of Women in Peru: An Exploratory Study  

ERIC Educational Resources Information Center

This ethnographic study relied primarily on case notes and interviews with the president of Centro Prenatal Vida Nueva, a pregnancy center in Lima, Peru, to study the sexual abuse experiences of 33 Peruvian women. Given the language limitations of the researchers, the analyses were completed in collaboration with the president of the center, a…

Deboer, Rebekah E.; Tse, Luke M.

2010-01-01

179

Helping English Learners Increase Achievement Through Inquiry-Based Science Instruction  

Microsoft Academic Search

This study summarizes the results of a four-year project in science education conducted in a rural setting with English learners in grades K-6 in the El Centro Elementary School District in southern California. Data were collected to measure student achievement in science, writing, reading, and mathematics for participating students. These data were analyzed relative to the number of years that

Olga Maia Amaral; Leslie Garrison

180

Enrichment, concentration and retention processes in relation to anchovy ( Engraulis ringens) eggs and larvae distributions in the northern Humboldt upwelling ecosystem  

Microsoft Academic Search

A Lagrangian model is used to simulate and quantify in the northern Humboldt upwelling ecosystem the processes of enrichment, concentration and retention, identified by Bakun [Bakun, A., 1996. Patterns in the ocean. Ocean processes and marine population dynamics. University of California Sea Grant, California, USA, in cooperation with Centro de Investigaciones Biologicas de Noroeste, La Paz, Baja California Sur, Mexico,

Christophe Lett; Pierrick Penven; Patricia Ayón; Pierre Fréon

2007-01-01

181

CASSAVA AGRONOMY RESEARCH AND ADOPTION OF IMPROVED PRACTICES IN THAILAND - MAJOR ACHIEVEMENTS DURING THE PAST 35 YEARS  

Microsoft Academic Search

This paper reviews the results of past research conducted from 1965 to 2000 in two major cassava growing areas, the northeastern and eastern parts of Thailand. This research was carried out by the Field Crops Research Institute, Department of Agriculture (DOA), in collaboration with Kasetsart University and the Centro Internacional de Agricultura Tropical CIAT). The major achievements are described under

Anuchit Tongglum; Preecha Suriyapan; Reinhardt H. Howeler

182

Dinámica del sistema agroforestal de chagras como eje de la producción indígena en el Trapecio Amazónico (Colombia) Chagras' agroforestal system dynamics as the basis for indigenous production in the Amazonian Trapezium (Colombia)  

Microsoft Academic Search

Resumen: La tradición indígena, la pertenencia a la cuenca Amazónica y la cercanía a un importante centro urbano como Leticia (Amazonas, Colombia) son factores que aportan elementos característicos al sistema de producción de Ciudad Jitoma y lo dife- rencian de otras formas de producción indígena y no-indígena, incluso dentro de la misma región ama- zónica. En el presente estudio se

Luz Amparo Triana-Moreno; Nohra Cecilia Rodríguez; Jesús García

183

Historia de una quimera. La industria algodonera en Castilla la Vieja, 1846-1913  

Microsoft Academic Search

En 1860 Valladolid albergaba el mayor distrito algodonero del centro de España. Transcurridas cuatro décadas, todas sus fábricas había sido ya clausuradas. El presente trabajo analiza las razones de este fracaso. Dado que los productos castellanos no podían competir con los catalanes debido al coste de la energía, los industriales de Valladolid y Santander tuvieron que refugiarse en el mercado

Javier Moreno Lázaro

2003-01-01

184

UMA EXPERIÊNCIA COM O PROJETO MANHATTAN NO ENSINO FUNDAMENTAL An experience with the Manhattan Project in the Elementary School  

Microsoft Academic Search

Resumo: O presente artigo discute uma dissertação de mestrado que utilizou uma perspectiva educacio- nal voltada à formação de cidadãos e defendida na proposta de Edgar Morin e no relatório da UNESCO sobre educação para o século XXI. Para isso, aborda a importância de uma nova prática escolar, preocupa- da em manter o estudante como centro das atividades em sala

Rafaela Samagaia; Luiz O. Q. Peduzzi

185

a Biopirataria: a pilhagem da natureza e do conhecimento , de Vandana Shiva (Petrópolis, Vozes, 2001)  

Microsoft Academic Search

Biodiversidade, proteção do meio ambiente, agricultura sustentável, agribusiness e alimentos geneticamente modificados - tais são os temas que cada vez mais ocupam o centro das controvérsias atuais sobre a agricultura, no mundo inteiro. O Brasil não é exceção, e entre os movimentos que dão a eles maior destaque encontra-se o MST. Imbuído de forte consciência ecológica desde sua fundação, e

Hugh Lacey; Marcos Barbosa de Oliveira

2001-01-01

186

Epileptic syndromes: differential treatment in infants, children, and adolescents.  

PubMed

This paper proposes therapeutic guidelines for the management of some epileptic syndromes in infants, children, and adolescents, based on available medical literature and clinical practice in the French Community of Belgium. The guidelines address both epileptic encephalopathies (West syndrome, Lennox-Gastaut syndrome, and Dravet syndrome) and idiopathic epilepsies (typical absence seizures, epilepsy with centro-temporal spikes and juvenile myoclonic epilepsy). PMID:22141279

Foulon, M; Aeby, A; Buzatu, M; Christiaens, F; de Borchgrave, V; de Cocq, C; de Tourtchaninoff, M; Dubru, J M; Ghariani, S; Grisar, T; Legros, B; Lienard, F; Ossemann, M; Tugendhaft, P; van Bogaert, P; van Rijckevorsel, K; Verheulpen, D; Vrielynck, P

2011-09-01

187

The role of Amazonian rivers for wintering ospreys (Pandion haliaetus): clues from North American band recoveries in Brazil between 1937 and 2006  

Microsoft Academic Search

In this paper we describe band-recovery data from 90 ospreys (Pandion haliaetus), banded in North America and recovered in Brazil between 1937 and 2006. Data were obtained from the Bird Banding Laboratory (US Geological Survey, USA) and from the Centro Nacional de Pesquisa para Conservação das Aves Silvestres (IBAMA, Brazil). The majority of ospreys were banded near the coast in

Luiz A. M. Mestre; Richard O. Bierregaard Jr

2009-01-01

188

Photoproduction of charm particles at Fermilab  

SciTech Connect

A brief description of the Fermilab Photoproduction Experiment E831 or FOCUS is presented. The experiment concentrates on the reconstruction of charm particles. The FOCUS collaboration has participants from several Central American and Latin American institutions; CINVESTAV and Universidad Autonoma de Puebla from Mexico, University of Puerto Rico from the United States, and Centro Brasileiro de Pesquisas Fisicas in Rio de Janeiro from Brasil.

Cumalat, John P. [University of Colorado, Department of Physics Boulder, Colorado 80309 (United States)

1997-03-15

189

75 FR 77654 - Notice of Intent To Prepare a Land Use Plan Amendment and an Environmental Impact Statement for...  

Federal Register 2010, 2011, 2012, 2013

...AGENCY: Bureau of Land Management, Interior. ACTION...Federal Land Policy and Management Act of 1976, as amended...the Bureau of Land Management (BLM) El Centro Field...Express Wind Energy Project Draft EIR/EIS by...maintenance, and decommissioning of wind turbine...

2010-12-13

190

SISTEMA REMOTO DE ADQUISICIÓN PARA EL CONTROL DEL RUIDO AMBIENTAL CON FPGA Y FPAA  

Microsoft Academic Search

RESUMEN Este artículo propone el diseño de un sistema de adquisición de datos con componentes digitales y analógicos microelectrónicos reconfigurables, como son el FPGA (Field Programmable Gate Array) y el FPAA (Field Programmable Analog Array), para monitorear y analizar la contaminación por ruido ambiental. Este prototipo obtiene los datos del ruido de una zona vial (zona centro de una ciudad)

A. Castillo Atoche; J. Vázquez Castillo; V. Sanchez Huerta; P. Del Río Dawn

191

The 2011 International Association of Breath Research (IABR) meeting in Parma, Italy: a collection of comments from attendees  

Microsoft Academic Search

ForewordThe 2011 Conference 'Breath Analysis Summit' was hosted by Antonio Mutti and Massimo Corradi, professors from the University of Parma, Italy. It was held at the Centro Congressi di Parma (Conference Center) in Parma. This was our highest attended breath conference to date, and by all measures, extremely successful. For this editorial the authors solicited comments from the attendees and

Joachim D Pleil; Anton Amann

2011-01-01

192

Conflict and Surrender during Sentence Processing: An ERP Study of Syntax-Semantics Interaction  

ERIC Educational Resources Information Center

Recent ERP studies report that implausible verb-argument combinations can elicit a centro-parietal P600 effect (e.g., "The hearty meal was devouring..."; Kim & Osterhout, 2005). Such eliciting conditions do not involve outright syntactic anomaly, deviating from previous reports of P600. Kim and Osterhout (2005) attributed such P600 effects to…

Kim, Albert; Sikos, Les

2011-01-01

193

Charting a New Course: Understanding the Sociocultural, Political, Economic and Historical Context of Latino/a Education in the United States  

ERIC Educational Resources Information Center

The work of addressing the challenge of the education of Latinos/as has begun through, among other efforts, the National Latino/a Education Research and Policy Project, or NLERAP. Beginning in 2000 as a national initiative of the Centro de Estudios Puertorriquenos at Hunter College, NLERAP's goal has been to add multiple Latino/a perspectives to…

Cammarota, Julio; Cannella, Chiara; Garcia, Emmanuel; Gonzalez, Maria; Irizarry, Jason G.; Moll, Luis C.; Nieto, Sonia; Pedraza, Pedro; Perez, Beatrix; Quinones, Sandra; Rivera, Melissa; Romo, Harriett; Valenzuela, Angela

2012-01-01

194

Perfil socioeconómico de Barranquilla, Cartagena y Santa Marta, 1990-2000  

Microsoft Academic Search

Este documento contiene los principales indicadores económicos y sociales de Cartagena, Santa Marta y Barranquilla -ciudades portuarias de la Costa Caribe-, los cuales se analizan comparativamente frente a los de otras ciudades. Los resultados señalan que el crecimiento económico de los centros urbanos costeños, medido en términos del PIB per cápita, y sus coberturas en servicios sociales, son relativamente inferiores

María Modesta Aguilera Diaz; Jorge Luis Alvis Arrieta

2000-01-01

195

LA GESTION DEL RIESGO EN COLOMBIA COMO HERRAMIENTA DE INTERVENCIÓN PÚBLICA PARA LA PREVENCIÓN Y MITIGACIÓN DE DESASTRES (1982 - 2008)  

Microsoft Academic Search

Los desastres ocurridos en centros urbanos, no sólo en Colombia (sismo de 1983 en Popayán, el sismo de 1999 en el eje cafetero), sino en otros países del mundo1, han generado interés acerca de las implicaciones de las amenazas en las ciudades. Ante ello el gobierno colombiano ha expresado su preocupación a través de una serie de reformas y leyes

Alexandra Vallejo

196

Visión de un científico oncólogo que aplica la investigación a la salud humana a través de las fronteras  

Cancer.gov

El doctor Jorge Gómez es el asesor principal del Centro para la Salud Mundial del Instituto Nacional del Cáncer. Dirige la Red de Investigación del Cáncer de los Estados Unidos y América Latina, la cual está realizando un estudio internacional de los factores de riesgo del cáncer de mama y características en las mujeres de América Latina.

197

An on-line digital autocorrelator for speckle interferometry  

Microsoft Academic Search

Interesting centro-symmetric observations which can benefit from speckle interferometry with autocorrelation include accurate measurements of angular diameters of stars and asteroids, and high resolution measurements of close binary stars leading to the precise determinations of their orbital elements and to the possible detection of perturbations from unseen companions in the systems. A description is presented of an on-line digital autocorrelator

P. R. Vokac

1977-01-01

198

The Use of Vetiver for Soil Erosion Prevention in Cassava Fields in Thailand  

Microsoft Academic Search

Cassava is a crop that induces high rates of soil erosion, especially if grown in sloping sandy soils. The joint research of the Centro Internacional de Agricultura Tropical (CIAT), the Department of Agriculture (DOA), and Kasetsart University (KU) revealed that adjustments in planting methods or planting systems could reduce soil erosion. Each method has certain advantages and disadvantages. While some

Wilawan Vongkasem; Kaival Klakhaeng; Watana Watananonta; Reinhardt H. Howeler

199

Bridging the Technology Gap for Low-Income Spanish-Speaking Immigrant Families  

ERIC Educational Resources Information Center

Research shows that families have a powerful effect on children's success in school. Parental involvement at home and in school is positively associated with children's school readiness and significant school performance. This study is focused on examining the impact of an intervention technology program--Community Learning Centers--(Centros

Rivera, Hector

2008-01-01

200

ESTRATEGIAS DE EDUCACIÓN PERSONALIZADA PARA LA ENSEÑANZA DE LA TELEDECCIÓN EN EL CICLO PREUNIVERSITARIO Tema do Trabalho: Sensoriamento Remoto no Ensino Fundamental e Médio  

Microsoft Academic Search

This work shows the program for secondary-level students prepared by the Centro de Fotogrametría, Cartografía y Catastro of the UNSJ. This program was based on the existing working material (books and others) at the school. It was meant for the 3rd. year students. An analysis and survey of the contents of the lectures in natural sciences was performed in general,

Mariana Martinelli; Graciela Salinas de Salmuni; Mirtha Martinez

201

Experience at the CENAM With Time and Frequency Standards Signals Received by the Global Positioning System (GPS).  

National Technical Information Service (NTIS)

The Time and Frequency Division of the Centro Nacional de Metrologia (CENAM) in Mexico has been working along two years with two high-stability signals reception systems: GPS and LORAN-C. We have determined the frequency stability of these systems using a...

H. Jardon-Aguilar J. M. Lopez-Romero J. T. Vega- Duran V. Molina-Lopez

1996-01-01

202

The Integration of the Information and Communication Functions, and the Marketing of the Resulting Products.  

ERIC Educational Resources Information Center

Discusses the theoretical basis for integration of information functions and communication functions, the relevance of this integration in the scientific information cycle, and its positive effect on commodity research networks. The application of this theory is described using three commodity programs of the Centro Internacional de Agricultura…

Harris, Susan C.

1985-01-01

203

Skills Recognition and Validation--Complexity and Tensions  

ERIC Educational Resources Information Center

This article seeks to identify and examine the reasons for the complexity and tensions underlying the skills recognition, accreditation and certification scheme (SRAC) that has been in place in Portugal since 2001. Empirical data were collected through semi-directive interviews with staff in three Centros Novas Oportunidades [CNOs] [New…

Cavaco, Carmen

2009-01-01

204

Promoting Entrepreneurial Culture in the University: The Institutional Collaborative Model at the Universidad Autonoma de Madrid  

ERIC Educational Resources Information Center

This paper presents a case of collaboration between different types of public services and the private sector for the promotion of an entrepreneurial culture. This collaboration is achieved by means of a centre established and developed by the Universidad Autonoma de Madrid, the Centro de Iniciativas Emprendedoras (the Centre for Entrepreneurial…

de Pablo, Isidro; Alfaro, Fernando; Rodriguez, Miriam; Valdes, Esperanza

2011-01-01

205

Political Yardstick Competition and Corporate Governance in the European Union  

Microsoft Academic Search

The question whether regulatory competition in the area of company law could take place in the European Union (EU) in a way similar to the form it takes in the United States (the Delaware phenomenon) is topical because of some recent judgments of the European Court of Justice (Centros) and documents and projects produced by the European Commission. That question

Pierre Salmon

2005-01-01

206

SISTEMA PARA GESTIONAR LA ACTIVIDAD CIENTÍFICA DEL DEPARTAMENTO DE INFORMÁTICA DE LA UNIVERSIDAD DE GUANTÁNAMO  

Microsoft Academic Search

El sistema para gestionar la actividad científica del Departamento de Informática de la Universidad de Guantánamo surge debido a la necesidad de gestionar de manera más rápida, segura y eficaz los procesos que se desarrollan actualmente en dicho centro. Fue desarrollado utilizando los lenguajes PHP del lado del servidor con CodeIgniter como framework y JavaScript del lado del cliente. Se

Denis Boizan Romero

2012-01-01

207

Modelo Conceitual de Segurança para uma Arquitetura Multidomínio em Telemedicina  

Microsoft Academic Search

Resumo - A comunicação e a troca de informações de maneira rápida e segura entre centros hospitalares geograficamente distribuídos tornam-se cada vez mais importantes em um cenário de telemedicina. Nesse contexto, pode-se compartilhar informações clínicas sensíveis, como a história do paciente, a fim de se ob- ter maior qualidade e precisão no atendimento ao paciente, com custos relativos menores. Este

João F. M. Figueiredo; Eduardo P. Serafim; Walber J. A. Silva; Diego S. A. Pizzol; Gustavo H. M. B. Motta

208

Quantitative EEG Magnitudes in Children with and without Attention Deficit Disorder during Neurological Screening and Cognitive Tasks.  

ERIC Educational Resources Information Center

Quantitative EEG magnitude data were obtained from children with and without attention deficit disorder (ADD). The data suggest that the right fronto-centro-temporal region is not as "cognitively activated" relative to the left hemisphere in those children with ADD. Neurotherapy training of the right frontal and central regions in ADD children was…

Crawford, Helen J.; Barabasz, Marianne

1996-01-01

209

The GEANT4 toolkit capability in the hadron therapy field: simulation of a transport beam line  

Microsoft Academic Search

At Laboratori Nazionali del Sud of the Instituto Nazionale di Fisica Nucleare of Catania (Sicily, Italy), the first Italian hadron therapy facility named CATANA (Centro di AdroTerapia ed Applicazioni Nucleari Avanzate) has been realized. Inside CATANA 62 MeV proton beams, accelerated by a superconducting cyclotron, are used for the radiotherapeutic treatments of some types of ocular tumours. Therapy with hadron

G. A. P. Cirrone; G. Cuttone; F. Di Rosa; L. Raffaele; G. Russo; S. Guatelli; M. G. Pia

2006-01-01

210

La doctora Amelie Ramírez ayuda a dirigir la investigación de las desigualdades en la atención del cáncer en la comunidad latina  

Cancer.gov

La doctora Ramírez es la investigadora principal de Redes en Acción, un centro del programa de redes comunitarias subvencionado por el NCI que se propone reducir la incidencia del cáncer en la comunidad latina a través de una red nacional de grupos comunitarios, investigadores, agencias de salud gubernamentales y la población en general.

211

HYBRID PREVIEW CONTROL OF STRUCTURES UNDER EARTHQUAKE EXCITATIONS  

Microsoft Academic Search

Passive, active and hybrid vibration control of structures during earthquakes were studied. Particular attention was given to hybrid preview control strategy for protection of structures against earthquakes. A three-story building under fixed-base condition and with laminated rubber bearing base isolation system subject to the El Centro 1940 earthquake were analyzed. The cases that an active control system with and without

J. Marzbanrad; G. Ahmadi

212

PENETRACIÓN DE Vibrio mimicus A TRAVÉS DE LA CÁSCARA DEL HUEVO DE TORTUGA LORA (Lepidochelys olivacea)1  

Microsoft Academic Search

Penetration of Vibrio mimicus through lora turtle (Lepidochelys olivacea) egg shells. The objective of this research was to determine the capability of this vibrio to trespass the turtle egg shell; the study was conducted at Centro Nacional de Ciencia y Tecnología de Alimentos in year 2000. This was done by inoculating the surface of the shell with the bacteria and

Mónica Pereira-Zamora; Francisco Hernández-Chavarría; Eric Wong-González; NOTA TÉCNICA

2007-01-01

213

Evaluacion de proceso del programa de educacion afectivo-sexual Ni ogros ni princesas.  

PubMed

RESUMEN Fundamento: En 2008, se puso en marcha el programa Ni ogros ni princesas en 12 centros de secundaria de Asturias (España) para incorporar la educación afectivo-sexual. El programa proponía 14 actividades, dirigidas a alumnado, profesorado y familias. Este estudio recoge la evaluación de proceso de esta intervención, en relación a la ejecución de las actividades, participación, satisfacción, utilidad percibida y propuestas de mejora. Métodos: La población de estudio fueron los 12 centros que participaron en el programa, y su alumnado, profesorado y familias. Se obtuvo información sobre la ejecución de actividades mediante un cuestionario de seguimiento; se recogió la satisfacción y utilidad percibida con cuestionarios auto-administrados para alumnado y profesorado; también se recogieron sus propuestas de mejora, y las de las familias, en grupos focales. Resultados: El número medio de actividades realizadas por los 12 centros fue 11,6. Se implicaron 185 docentes (26%), que impartieron sesiones al 81% del alumnado en estos 12 centros. El número medio de sesiones impartidas fue 6 en cada nivel de la ESO. El 79% del profesorado se sintió bastante/muy satisfecho con su actuación y al 65% del alumnado le gustaron bastante/mucho estas sesiones. Más del 60% de estudiantes y docentes consideraron que estas sesiones servían bastante/mucho para aumentar conocimientos, reflexionar, mejorar la igualdad, conocer otras opiniones y favorecer el respeto a la diversidad sexual. Entre las propuestas de mejora, más horas para la educación sexual, liberación horaria para el profesorado, y más actividades para familias. Conclusiones: El programa fue una intervención novedosa y percibida como útil para incorporar la educación sexual en los centros de secundaria, ya que contó con un gran nivel de ejecución, así como una alta participación, satisfacción y utilidad percibida por el alumnado y profesorado. PMID:24801790

García-Vázquez, Jose; Ordóñez, Adelina Lena; Alvarez, Y Óscar Suárez

2012-06-01

214

Antimicrobial susceptibility patterns for pathogens isolated from patients in Latin American medical centers with a diagnosis of pneumonia: analysis of results from the SENTRY Antimicrobial Surveillance Program (1997) 1 1 SENTRY Latin America Study Group includes: H.S. Sader (Brazil-Latin America Coordinator); J. Sampaio (Lâmina Laboratory, Rio de Janeiro, Brazil); C. Zoccoli (Santa Lúzia Laboratory, Florianopolis, Brazil); J.M. Casellas (Centro de Estudios en Antimicrobianos, San Isidro, Argentina); J. Smayevsky (Microbiology Laboratory C.E.M.I.C., Buenos Aires, Argentina); V. Prado (Faculdad de Medicina de Chile, Santiago, Chile); E. Palavecino (Universidad Catolica del Chile, Santiago, Chile); H. Bagnulo (Hospital Maciel, Montivideo, Uruguay); J.A. Robledo (Corporation Para Investigaciones Biologicas, Medellin, Colombia); and J. Sifuentes-Osornio (Instituto Nacional de la Nutricion, Ciudade del Mexico, Mexico)  

Microsoft Academic Search

Pneumonia is the most common fatal hospital-acquired infection, with attributable mortality rates ranging from 30 to 60%. Rapid initiation of optimal antimicrobial therapy is essential for obtaining treatment success. In this report the antimicrobial susceptibility of 556 strains from the lower respiratory tract were collected by the SENTRY Antimicrobial Surveillance Program (1997). These strains were isolated from hospitalized patients with

Helio S. Sader; Ronald N. Jones; Ana C. Gales; P. Winokur; Kari C. Kugler; Michael A. Pfaller; Gary V. Doern

1998-01-01

215

Estabilidad de los modelos de Heggie y Ramamani  

NASA Astrophysics Data System (ADS)

Los modelos de Heggie y Ramamani de satélites galácticos en órbitas circulares se basan en una teoría aproximada, por lo que es importante verificar su estabilidad mediante simulaciones numéricas. En esta forma, hemos logrado mostrar que son estables sobre intervalos de tiempo mucho mayores que los que lograron los propios autores de los modelos. Por otra parte, dado que hemos mostrado que el caos es significativo en estos modelos, son un sistema ideal para investigar si, pese a ello, se mantienen estacionarios. Nuestras simulaciones numéricas muestran que, pese al caos, la estacionariedad se mantiene sobre intervalos de centenares de tiempos de cruce del sistema, mucho mayores que los tiempos de Liapunov característicos de sus movimientos caóticos.

Muzzio, J. C.; Vergne, M. M.; Wachlin, F. C.; Carpintero, D. D.

216

Insertion of nitriles into complexes of tantalum pentachloride with amines  

SciTech Connect

Data from the study of the insertion of aceto-, propio-, and benzonitrile into complexes of TaCl/sub 5/ with diethyl- and triethylamine in CCl/sub 4/ solutions have been discussed. It has been established that the nature of the ligands, rather than the nitrile being inserted into the complex, has a significant influence on the composition of the final products. In contrast to the case of acetonitrile, the insertion of propionitrile and benzonitrile into a complex is observed already at room temperature. On the basis of spectroscopic data it has been postulated that the carbon tetrachloride employed as a solvent accelerates the insertion of nitriles and promotes their deprotonation in the presence of an aprotic amine.

Glushkova, M.A.; Chumaevskii, N.A.; Khmelevskaya, L.V.; Ershova, M.M.; Buslaev, Yu.A.

1988-01-01

217

Curva de rotación de la Galaxia Eso 321-25  

NASA Astrophysics Data System (ADS)

Se presenta la curva de rotación de esta galaxia, generada a partir de espectros obtenidos con el Espectrógrafo Multifunción del telescopio de 1.54 m de Bosque Alegre. El análisis de las curvas de velocidad radial obtenidas muestra que el núcleo no coincide con el centro de simetría de las mismas, lo que es consistente con el aspecto morfológico exhibido por la galaxia en imágenes de banda ancha. En estas últimas, el núcleo muestra una estructura peculiar y no coincidiría con el centro geométrico del disco aparente. Los flujos relativos de líneas (H? /[NII]? 6583 y [SII]? 6731/? 6716) indicarían niveles de excitación y densidad electrónica normales en regiones HII, aún en la zona nuclear. Este trabajo forma parte de un programa de estudio de cinemática, excitación y densidad electrónica del gas ionizado en galaxias peculiares del Atlas de Galaxias Australes de Sérsic.

Díaz, R.; Carranza, G.; Ahumada, J.; Arreguine, V.

218

Growth, Structural And Optical Studies On Bis L-alanine Lithium Chloride (BLALC) Single Crystal  

Microsoft Academic Search

Bis L-alanine Lithium Chloride (BLALC) single crystals were grown successfully by solution method with slow evaporation technique at room temperature. Crystals of size 15 x 9 x 4 mm3 have been obtained in 28 days. The grown crystals were colourless and transparent. Single crystal X-ray diffraction (XRD) study showed that BLALC belongs to orthorhombic system with a non-centro-symmetric space group

A. S. J. Lucia Rose; P. Selvarajan; S. Perumal

2011-01-01

219

Avaliação das áreas verdes em espaços públicos no município de Guarapuava\\/PR  

Microsoft Academic Search

Apresenta-se neste artigo uma proposta metodológica para se avaliar o desempenho das áreas verdes públicas do Município de Guarapuava\\/PR, mais especificamente sua arborização de acompanhamento viário de sua área central. Guarapuava é uma cidade que conta com aproximadamente 160 mil habitantes, situada na região centro-sul do Estado. A proposta metodológica que ora se apresenta, aplicada em parcela do município, foi

Carlos Roberto Loboda; Bruno Luiz Domingos de Angelis; Generoso de Angelis Neto; Eraldo Schunk da Silva

2007-01-01

220

Content Management System for Developing a Virtual Platform for Association of Women's Aid with Lack of Resources  

Microsoft Academic Search

\\u000a In this paper we show a Virtual Platform for an Association of Women’s Aid called Centro Integral de Ayuda a la Mujer (CIAM).\\u000a After analyzing different Content Management Systems (CMS) and the benefits that its use would contribute to the development\\u000a of the Virtual Platform, taking into account the needs and requirements set by CIAM, we have opted for the

Beatriz Sainz de Abajo; Alberto Flores García; Enrique García Salcines; Francisco Javier Burón Fernández; Miguel López Coronado; Carlos de-Castro-Lozano

2010-01-01

221

Evidence for an involvement of actin in the positioning and motility of centrosomes  

Microsoft Academic Search

Cultured human polymorphonuclear leukocytes exposed to the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA) spread on the substratum and undergo centro- some splitting. The two centrioles may separate by a distance of several micrometers, each being surrounded by an aster of microtubules. Here we show that the centriole\\/aster com- plexes are in constant, rapid motion through the cytoplasm, carrying with them some of

URSULA EUTENEUER; MANFRED SCHLIWA

1985-01-01

222

Prospective surveillance applying the national nosocomial infection surveillance methods in a Brazilian pediatric public hospital  

Microsoft Academic Search

Background: A hospital-wide, traditional prospective surveillance for nosocomial infections was commenced in 1992 in Centro Geral de Pediatria in Minas Gerais, Brazil, to describe the epidemiology of nosocomial infection in this pediatric hospital and to implement cross-infection prevention and control policies. Methods: We performed a prospective cohort nosocomial infection surveillance of all patients receiving acute care according to the hospital-wide

J. M. M. Lopes; E. Tonelli; J. A. Lamounier; B. R. G. M. Couto; A. L. Siqueira; F. Komatsuzaki; A. P. Champs; C. E. F. Starling

2002-01-01

223

A study of migration to Greater Santiago (Chile)  

Microsoft Academic Search

\\u000a Resumen  Se presentan los resultados mas significativos de una encuesta realizada en el Gran Santiago (Chile) en 1962 por el Centro\\u000a Latinamericano de Demografia de las Naciones Unidas (CELADE). La población estudiada era por entonces de, aproximadamente,\\u000a 2.054.000 habitantes. Dieha investigación utilizó una muestra probabílistiea de poco más que 2.000 hogares familiares. Los\\u000a cuestionarios fueron diseñados para investigar características demoqráficas y

Juan C. Elizaga

1966-01-01

224

Enrichment Factor and Profiles of Elemental Composition of PM 2.5 in the City of Guadalajara, Mexico  

Microsoft Academic Search

In this study, the Enrichment Factors and elemental composition profiles of the PM2.5 were used to suggest the emission sources.\\u000a The selected sites were Miravalle and Centro, and in both cases there were high values lead, Cadmium, Cobalt, Chromium, Cupper,\\u000a Molybdenum, Nickel, Antimony, Selenium and Zinc for EF (>5), suggesting an anthropogenic origin. The remaining elements (Iron,\\u000a Magnesium, Manganese, Strontium

Leonel Hernández-Mena; Mario Murillo-Tovar; Martín Ramírez-Muñíz; Edith Colunga-Urbina; Iliana de la Garza-Rodríguez; Hugo Saldarriaga-Noreña

225

Chiral induction from ligands to metal centres. A copper(II)–nitroxide complex  

Microsoft Academic Search

Copper(II) complexes of a racemic mixture of a chiral nitronyl-nitroxide are characterised. One, A, is a centro-symmetrical species where two enantiomers are coordinated to a metal centre. The second, B, is a 1D compound comprising bridging ligands through the oxyl and pyridyl donor sites. One observes that, although the crystals are racemic, within a chain, all ligands and metal centres

Victor Ovcharenko; Galina Romanenko; Yuri Shvedenkov

2001-01-01

226

Boletín del Instituto Nacional del Cáncer - 07-20-2010  

Cancer.gov

El doctor Harold Varmus, acompañado de su esposa Constance Casey (centro), presta juramento como director del NCI ante la Secretaria del Departamento de Salud y Servicios Humanos, Kathleen Sebelius, el lunes 12 de julio. (Foto cortesía de Chris Smith) El 12 de julio, el doctor Harold Varmus prestó juramento ante la Secretaria del Departamento de Salud y Servicios Humanos de los Estados Unidos, Kathleen Sebelios, como el decimocuarto director del Instituto Nacional del Cáncer.

227

Essential oil profiles of new Citrus hybrids, a tool for genetic citrus improvement  

Microsoft Academic Search

The essential oil composition of new Citrus hybrids obtained from the Citrus genetic improvement programs at the CRA-Centro di Ricerche per l’Agrumicoltura e le Colture Mediterranee of Acireale, Italy (CRA-ACM), were used to evaluate the fruit quality and to identify new valuable flavor components. The common objective of genetic improvement programs is to generate Citrus cultivars with a higher resistance

Simona Fabroni; Giuseppe Ruberto; Paolo Rapisarda

2012-01-01

228

AVANCES EN EL MEJORAMIENTO GENETICO DE LA SOYA EN COSTA RICA: CIGRAS-l VARIEDAD SIN LIPOXIGENASAS, PARA EL CONSUMO HUMANOJ  

Microsoft Academic Search

CIGRAS-l es una variedad de soya sin Advances in soybean improvement in lipoxigenasas 2 (SBL2) y 3 (SBL3) que fue Costa Rica: CIGRAS-l a soybean variety desarrollada en el Centro para Investigaciones en lacking seed lipoxygenases, for human con- Granos y Semillas (CIGRAS) de la Universidad sumption. This soybean variety lacking li- de Costa Rica. Esta nueva variedad se origino

Fausto Camacho; Enrique Villalobos

229

Centrifuge modeling of dynamic behavior of pile-reinforced slopes during earthquakes  

Microsoft Academic Search

A series of centrifuge model tests of sandy slopes were conducted to study the dynamic behavior of pile-reinforced slopes\\u000a subjected to various motions. Time histories of accelerations, bending moments and pile earth pressures were obtained during\\u000a excitation of the adjusted El Centro earthquake and a cyclic motion. Under a realistic earthquake, the overall response of\\u000a the pile-reinforced slope is lower

Yu-zhen Yu; Li-jun Deng; Xun Sun; He Lü

2010-01-01

230

Detection of number of sources via exploitation of centrosymmetry property  

Microsoft Academic Search

Forward\\/backward (FB) averaging is a technique which can be employed in sensor array signal processing for exploiting a so-called centro-symmetry property of the signal subspace to improve parameter estimation accuracy. Although FB averaging effectively doubles the number of data samples, it also introduces correlation among these data vectors. This correlation complicates not only the performance analysis, but also the detection

Guanghan Xu; Richard H. Roy; Thomas Kailath

1994-01-01

231

Traumatic tears of the tela chorioidea: a hitherto unrecognized cause of post-traumatic hydrocephalus.  

PubMed

A new and hitherto unrecognized phenomenon of rupture of the tela chorioidea in closed head injury of acceleration-deceleration type is described. It occurs very frequently, especially in association with blows in the centro-axial plane even if the acceleration forces are relatively mild. These tears are regularly followed by intraventricular bleeding which follows the flow of the CSF into the subarachnoid space producing a leptomeningeal reaction with impairment of absorption of CSF and consequent communicating hydrocephalus. PMID:6581709

Grcevi?, N

1983-01-01

232

Centromeric Retroelements and Satellites Interact with Maize Kinetochore Protein CENH3  

Microsoft Academic Search

Maize centromeres are composed of CentC tandem repeat arrays, centromeric retrotransposons (CRs), and a variety of other repeats. One particularly well-conserved CR element, CRM, occurs primarily as complete and uninterrupted elements and is interspersed thoroughly with CentC at the light microscopic level. To determine if these major centro- meric DNAs are part of the functional centromere\\/kinetochore complex, we generated antiserum

Cathy Xiaoyan Zhong; Joshua B. Marshall; Christopher Topp; Rebecca Mroczek; Akio Kato; Kiyotaka Nagaki; James A. Birchler; Jiming Jiang; R. Kelly Dawe

2002-01-01

233

Closing the Gap: Merging Student Affairs, Advising and Registration  

Microsoft Academic Search

In a pilot study at El Centro College, an urban college in the Dallas County Community College District, students in a new-to-college educational framework class were offered an intervention intended to enhance the academic advising process. The intervention consisted of in-class career services advising, degree selection, degree planning, course selection, course scheduling, and training in the college's on-line registration system.

David T. Goomas

2012-01-01

234

LEGRI Science Operation Center. Architecture and Operations  

Microsoft Academic Search

The LEGRI Science Operation Center (SOC) is the single contact pointbetween the MINISAT-01 Centro de Operaciones Científicas (COC)located at Villafranca del Castillo (Madrid) and the LEGRI Consortium.Its architecture, operational procedures and associated software hasbeen developed at the Universities of Valencia and Birmingham on thescope to define a integrated Data Analysis System, able to perform thedaily follow-up of the instrument health,

Pere Blay; Julia Suso; Almudena Robert; Jose Luis Requena; Jorge Alamo; Victor Reglero; Chris J. Eyles

2001-01-01

235

Developing the IBA equipment to increase the versatility of the CNA  

Microsoft Academic Search

The Centro Nacional de Aceleradores (CNA) in Sevilla-Spain currently contains three accelerators: two tandems and a compact 18\\/9 cyclotron. Next year, a 60Co irradiation system will also be installed. This equipment will expand the range of irradiation experiments in the Centre using both charged particles as well as gamma-ray photons. Originally, based on the 3MV tandem accelerator, the CNA was

Y. Morilla; M. C. Jiménez-Ramos; J. García López; J. A. Labrador; F. R. Palomo; I. Ortega-Feliu

236

Clinical Results of an Autologous Engineered Skin  

Microsoft Academic Search

Introduction: An artificial complete skin (dermis and epidermis) model has been developed in the Tissue engineering unit of the Centro\\u000a Comunitario de Sangre y Tejidos del Principado de Asturias (CCST) and CIEMAT. This engineered skin has been employed for the\\u000a treatment of severe epithelial injuries. In this paper, the clinical results obtained with this engineered skin during the\\u000a last 18 months

Sara Llames; Eva García; Verónica García; Marcela del Río; Fernando Larcher; Jose Luis Jorcano; Eva López; Purificación Holguín; Francisca Miralles; Jesús Otero; Alvaro Meana

2006-01-01

237

CURVA De ReFeReNCIA PeRUANA DeL PeSo De NACIMIeNTo PARA LA eDAD GeSTACIoNAL Y SU APLICACIÓN PARA LA IDeNTIFICACIÓN De UNA NUeVA PobLACIÓN NeoNATAL De ALTo RIeSGo  

Microsoft Academic Search

ReSUMeN El peso de nacimiento en relación con la edad gestacional, tiene valor pronóstico y sirve para el manejo clínico del recién nacido. La OMS recomienda patrones de crecimiento fetal en los centros perinatológicos, pues se detecta diferencias según países y condiciones de vida. Objetivos. Obtener una curva de referencia peruana del peso de nacimiento para la edad gestacional (CR-PNEG),

Manuel Ticona-Rendón; Diana Huanco-Apaza

238

Astronomia para/com crianças carentes em Limeira  

NASA Astrophysics Data System (ADS)

Em 2001, o Instituto Superior de Ciências Aplicadas (ISCA Faculdades de Limeira) iniciou um projeto pelo qual o Observatório do Morro Azul empreendeu uma parceria com o Centro de Promoção Social Municipal (CEPROSOM), instituição mantida pela Prefeitura Municipal de Limeira para atender crianças e adolescentes carentes. O CEPROSOM contava com dois projetos: Projeto Centro de Convivência Infantil (CCI) e Programa Criança e Adolescente (PCA), que atendiam crianças e adolescentes em Centros Comunitários de diversas áreas da cidade. Esses projetos têm como prioridades estabelecer atividades prazerosas para as crianças no sentido de retirá-las das ruas. Assim sendo, as crianças passaram a ter mais um tipo de atividade - as visitas ao observatório. Este painel descreve as várias fases do projeto, que envolveu: reuniões de planejamento, curso de Astronomia para as orientadoras dos CCIs e PCAs, atividades relacionadas a visitas das crianças ao Observatório, proposta de construção de gnômons e relógios de Sol nos diversos Centros Comunitários de Limeira e divulgação do projeto na imprensa. O painel inclui discussões sobre a aprendizagem de crianças carentes, relatos que mostram a postura das orientadoras sobre a pertinência do ensino de Astronomia, relatos do monitor que fez o atendimento no Observatório e o que o número de crianças atendidas representou para as atividades da instituição desde o início de suas atividades e, em particular, em 2001. Os resultados são baseados na análise de relatos das orientadoras e do monitor do Observatório, registros de visitas e matérias da imprensa local. Conclui com uma avaliação do que tal projeto representou para as Instituições participantes. Para o Observatório, em particular, foi feita uma análise com relação às outras modalidades de atendimentos que envolvem alunos de escolas e público em geral. Também é abordada a questão do compromisso social do Observatório na educação do público em questão.

Bretones, P. S.; Oliveira, V. C.

2003-08-01

239

Effect of shading on growth and dinitrogen fixation of kudzu and tropical pasture legumes  

Microsoft Academic Search

Dry matter production and dinitrogen fixation characteristics in kudzu (Pueraria lobata Ohwi) and some tropical pasture legumes, centro (Centrosema pubescens) and siratro (Macroptilium atropurpureurn cv siratro) were studied under full sunlight and shaded conditions. Nodulating (T202) and nonnodulating (T201) soybean (Glycine max L. Merr.) isolines, were used as reference crops.The results obtained showed that:1. Under full sunlight conditions, the whole

Kounosuke Fujita; Katsushi Matsumoto; Godfred K. Ofosu-Budu; Shoitsu Ogata

1993-01-01

240

The new Cyclone 18\\/9 beam transport line at the CNA (Sevilla) for high energy PIXE applications  

Microsoft Academic Search

The Cyclone 18\\/9 cyclotron system at the Centro Nacional de Aceleradores (Sevilla, Spain) is commonly used to create short life radioisotopes for PET applications. Besides, an external beam transport line has been recently installed in one of the target ports with two major purposes: to study the effects of 18MeV protons irradiation on the behaviour of electronic devices for space

J. García López; I. Ortega-Feliu; Y. Morilla; A. Ferrero

2008-01-01

241

Advanced technologies in the ASI MLRO towards a new generation laser ranging system  

Microsoft Academic Search

Matera Laser Ranging Observatory (MLRO) is a high performance, highly automated optical and astronomical observatory currently under design and development by AlliedSignal for the Italian Space Agency (ASI). It is projected to become operational at the Centro Geodesia Spaziale in Matera, Italy, in 1997. MLRO, based on a 1.5-meter astronomical quality telescope, will perform ranging to spacecraft in earthbound orbits,

Thomas Varghese; Giuseppe Bianco

1994-01-01

242

LA BANCA DATI METEOROLOGICA STORICA DELLA REGIONE ABRUZZO: RICERCA DI UN METODO PER RAPPRESENTARE I DATI RILEVATI A FINI AGRONOMICI  

Microsoft Academic Search

Il lavoro riporta un'attività di servizio, finalizzata alla diffusione dei dati meteorologici archiviati presso le banche dati del Centro a supporto di Progetti di ricerca e sperimentazione attinenti ai diversi Servizi dell'Agenzia. L'elaborazione del regime termo-pluviomertrico per alcune località della piana del Fucino (Altopiano interno in provincia dell'Aquila), utilizzando alcuni metodi semplici di statistica descrittiva, ha consentito di ottenere report

243

BSC-CNS Research and Supercomputing Resources  

Microsoft Academic Search

Early in 2004 the Ministry of Education and Science (Spanish Government), Generalitat de Catalunya (local Catalan Government)\\u000a and Technical University of Catalonia (UPC) took the initiative of creating a National Supercomputing Center in Barcelona.\\u000a BSC-CNS (Barcelona Supercomputing Center—Centro Nacional de Supercomputación) is the National Supercomputing Facility in Spain\\u000a and was officially constituted in April 2005. BSC-CNS manages MareNostrum, one of

David Vicente; Javier Bartolome

244

Experience in Parallel Computational Mechanics on MareNostrum  

Microsoft Academic Search

We present in this paper the experience of the authors in solving very large problems of computational mechanics on a supercomputer.\\u000a The authors are researchers of the Barcelona Supercomputing Center-Centro Nacional de Supercomputación (BSC-CNS), a brand\\u000a new research center in Spain, which hosts the fastest supercomputer in Europe and the fifth in the world: MareNostrum (TOP500,\\u000a November 2006). A brief

G. Houzeaux; M Vazquez; R Grima; H Calmet; J. M Cela

245

Analysis of sulphadoxine\\/pyrimethamine resistance-conferring mutations of Plasmodium falciparum from Mozambique reveals the absence of the dihydrofolate reductase 164L mutant  

Microsoft Academic Search

BACKGROUND: Plasmodium falciparum is the predominant human malaria species in Mozambique and a lead cause of mortality among children and pregnant women nationwide. Sulphadoxine\\/pyrimethamine (S\\/P) is used as first line antimalarial treatment as a partner drug in combination with artesunate. METHODS: A total of 92 P. falciparum-infected blood samples, from children with uncomplicated malaria attending the Centro de Saude de

Natércia Fernandes; Paula Figueiredo; Virgilio E do Rosário; Pedro Cravo

2007-01-01

246

Centrosymmetry enhances quantum transport in disordered molecular networks  

NASA Astrophysics Data System (ADS)

For more than 50 years we have known that photosynthetic systems harvest solar energy with almost unit quantum efficiency. However, recent experimental evidence of quantum coherence during the excitonic energy transport in photosynthetic organisms challenges our understanding of this fundamental biological function. Currently, and despite numerous efforts, the causal connection between coherence and efficiency is still a matter of debate. We show, through extensive simulations of quantum coherent transport on networks, that three dimensional structures characterized by centro-symmetric Hamiltonians are statistically more efficient than random arrangements. Moreover, a strong correlation of centro-symmetry with quantum efficiency is also observed under the coherent transport dynamics induced by experimentally estimated electronic Hamiltonians of the Fenna-Mathew-Olson complex of sulfur bacteria and of the cryptophyte PC645 complex of marine algae. The application of a genetic algorithm results in a set of optimized Hamiltonians only when seeded from the experimentally estimated Hamiltonian. These results suggest that what appears to be geometrically disordered complexes may well exhibit an inherent hidden symmetry which enhances the energy transport between chromophores. We are confident that our results will motivate research to explore the properties of nearly centro-symmetric Hamiltonians in realistic environments, and to unveil the role of symmetries for quantum effects in biology. The unravelling of such symmetries may open novel perspectives and suggest new design principles in the development of artificial devices.

Zech, Tobias; Mulet, Roberto; Wellens, Thomas; Buchleitner, Andreas

2014-05-01

247

Genotoxicity in oral epithelial cells in children caused by nickel in metal crowns.  

PubMed

The micronucleus (MN) assay evaluates the effects of low doses of genotoxic carcinogens and can detect structural lesions that survive mitotic cycles. The objective of this study was to determine both the genotoxicity of nickel (Ni) in buccal epithelial cells and the urinary excretion of Ni in children with metal crowns. This was a prospective longitudinal study based on 37 patients selected at the Facultad de Odontología de la Universidad Autónoma de Coahuila. MN assays were performed using buccal cells from the 37 patients, and Ni levels were determined from urine samples using inductively coupled plasma mass spectrometry at 1 (basal value), 15, and 45 days following the placement of crowns in each patient. Ni urinary excretion levels increased from 2.12 ± 1.23 to 3.86 ± 2.96 mg Ni/g creatinine (P < 0.05) and the frequency of exposed micronuclei increased from 4.67 ± 0.15 to 6.78 ± 0.167/1000 cells (P < 0.05) between 1 and 45 days post-crown placement. These results suggest that odontological exposure to metal crowns results in genotoxic damage at the cellular level of the oral mucosa and an increase in the urinary excretion of Ni within 45 days of exposure. PMID:24065660

Morán-Martínez, J; Monreal-de Luna, K D; Betancourt-Martínez, N D; Carranza-Rosales, P; Contreras-Martínez, J G; López-Meza, M C; Rodríguez-Villarreal, O

2013-01-01

248

[Toxic fungi in Buenos Aires City and surroundings].  

PubMed

In Facultad de Ciencias Exactas y Naturales,Universidad de Buenos Aires there is a service called Servicio de Identificación de Hongos Tóxicos, directed by researchers of the Program of Medicinal Plants and Fungi Involved in Biological Degradation (PROPLAME-PRHIDEB, CONICET) that assist hospitals and other health establishments, identifying the different samples of fungi and providing information about their toxicity, so that patients can receive the correct treatment. The objective of the present study was to analyze all the cases received from 1985 to 2012. This analysis permitted the confection of a table identifying the most common toxic species. The information gathered revealed that 47% of the patients were under 18 years of age and had eaten basidiomes; the remaining 53% were adults who insisted that they were able to distinguish edible from toxic mushrooms. Chlorophyllum molybdites turned out to be the main cause of fungal intoxication in Buenos Aires, which is commonly confused with Macrolepiota procera, an edible mushroom. In the second place Amanita phalloides was registered, an agaric known to cause severe symptoms after a long period of latency (6-10 hours), and which can lead to hepatic failure even requiring a transplant to prevent severe internal injuries or even death, is not early and correctly treated. PMID:24152394

Romano, Gonzalo M; Iannone, Leopoldo; Novas, María V; Carmarán, Cecilia; Romero, Andrea I; López, Silvia E; Lechner, Bernardo E

2013-01-01

249

A new reference collection of documented human skeletons from Mérida, Yucatan, Mexico.  

PubMed

This report documents the history and composition of a new reference collection currently composed of 84 identified human skeletons from the modern cemetery of Xoclán in Mérida, Yucatan, Mexico. The skeletal sample is the first of its kind in the Yucatan peninsula, a region with a population short of two million mostly local and non-local Mexican residents and descendants of the ancient Maya. The growing collection is curated at the Facultad de Ciencias Antropológicas (School of Anthropological Sciences) of the Autonomous University of Yucatan. Here we describe recovery procedures, preservation, background information and validation measures of the individuals who make up the collection. Detailed information on the generational pattern, sex, and age distribution, along with socioeconomic context and provenance of the skeletons are provided. The majority of the skeletal series is represented by males and by older individuals of both sexes. Almost all of these individuals come from Mérida's middle and lower socioeconomic sectors and died within the urban city boundaries. Biographic information was collected on each individual at the municipal civil registry and confronted with information of national and municipal censuses (2000 and 2005), to be validated and to be discussed here in terms of the representativeness of the reference series and its potential uses in forensic, anthropological and medical research. PMID:23830157

Chi-Keb, J R; Albertos-González, V M; Ortega-Muñoz, A; Tiesler, V G

2013-10-01

250

[Orthotopic liver transplant in rats. Surgical technique, complications and treatment].  

PubMed

The orthotopic rat liver transplant model is a widely used technique in transplantation research. It has many advantages over other animal transplant models because of its availability and low cost. However, it must be emphasized that success with the rat model requires thorough training. The aim of this paper is to describe the microsurgical technique involved in 60 rat liver transplants and to discuss the complications and their treatments. Forty-nine liver transplants were performed at the Experimental Laboratory of the University Hospital, Ontario, Canada (ELUH) and 11 were performed at the Laboratorio de Trasplante de Organos de la Facultad de Ciencias Médicas de La Plata, Buenos Aires. Argentina (LTO). Among the transplants performed at the ELUH, the observed complications were haemorrhage (n = 4), pneumothorax (n = 1), anastomotic failure (n = 15), bile leak (n = 3), and bile duct necrosis (n = 9). The remaining 17 rats at the ELUH were healthy at day 7 after surgery. Animal survival immediately postop, at 24 hours postop and at 7 days postop was achieved with the 9th, 20th and 21st transplants respectively. At the LTO, 3 rats died as a result of anaesthetic complications. Seven-day animal survival was achieved with the 11th transplant. We beleive that the description of the orthotopic rat liver transplantation technique, as well as the discussion regarding complications and their management, can be useful for researchers interested in performing liver transplantation in rats. PMID:12553156

Lausada, Natalia R; Gondolesi, G E; Ortiz, E; Dreizzen, E; Raimondi, J C

2002-01-01

251

PREFACE: Third Congress on Materials Science and Engineering (CNCIM-Mexico 2012)  

NASA Astrophysics Data System (ADS)

The Third Congress on Material Science and Engineering (CNCIM-México 2012), which took place in Mérida, México, from 27 February to 2 March 2012 was organized by three research groups (cuerpos académicos) from the Universidad Autónoma de Yucatán: Ingeniería Física (UADY-CA-27), Modelado y Simulación Computacional de Sistemas Físicos (UADY-CA-101) and Química Fundamental y Aplicada (UADY-CA-32), in collaboration with the Centro de Investigación y de Estudios Avanzados (Cinvestav-Mérida). The First Congress in Material Science and Engineering (CNCIM-2010), was organized in Puebla, México in February 2010. This was followed by CNCIM-2011 held in Toluca, México in February 2011. The CNCIM-México 2012 Conference consisted of plenary talks (8), invited talks (10), oral contributions (54) and poster presentations (70). The topics of the Conference were: Synthesis and Preparation of Materials: Organic and Inorganic Characterization of Materials: Novel Methods and Techniques Applications of Materials: Environment, Medicine, Pharmacy, Technology, Food and Renewable Energy New Materials: Composites, Nanostructures, and from Natural Sources Theory: New Methods and Computer Simulations We want to thank the Organizing Committee, the Institutions and Sponsors supporting the Conference, and everyone who contributed to the organization of this meeting, for their invaluable efforts in order to guarantee the complete success of this conference. Editors Romeo de Coss Centro de Investigación y de Estudios Avanzados del I.P.N. (Cinvestav-Mérida) A.P. 73 Cordemex 97310, Mérida, Yucatán, México decoss@mda.cinvestav.mx Gabriel Murrieta-Hernández Universidad Autónoma de Yucatán Calle 60 No. 491-A, Centro Histórico, C.P. 97000, Mérida, Yucatán, México murrieta@uady.mx Aarón Aguayo-González Universidad Autónoma de Yucatán Calle 60 No. 491-A, Centro Histórico, C.P. 97000, Mérida, Yucatán, México aguayo@uady.mx Efraín Rubio-Rosas Benemérita Universidad Autónoma de Puebla Ciudad Universitaria, Col. San Manuel, C.P. 72570, Puebla, Puebla, México efrain.rubio@cuv.buap.mx Ernesto Chigo-Anota Benemérita Universidad Autónoma de Puebla Ciudad Universitaria, Col. San Manuel, C.P. 72570, Puebla, Puebla, México ernesto.chigo@correo.buap.mx Enrique Vigueras-Santiago Universidad Autónoma del Estado de México Instituto Literario No. 100, Col. Centro 50000, Toluca, Edo. de México, México vigueras@uaemex.mx Session Chairs Gabriel Canto Santana, Universidad Autónoma de Campeche. Enrique Vigueras Santiago, Universidad Autónoma del Estado de México. César Cab, Universidad Autónoma de Yucatán. Alejandro ávila Ortega, Universidad Autónoma de Yucatán. Jesús Barrón Zambrano, Universidad Autónoma de Yucatán. Maritza de Coss, Universidad Autónoma de Yucatán. Jorge A. Tapia González, Universidad Autónoma de Yucatán. David Muñoz Rodríguez, Universidad Autónoma de Yucatán. Mario Pérez Cortes, Universidad Autónoma de Yucatán. Jesús García Serrano, Universidad Autónoma del Estado de Hidalgo. Rubén Arturo Medina Esquivel, Universidad Autónoma de Yucatán. César R. Acosta, Universidad Autónoma de Yucatán. Organizing Committee Aarón Aguayo González, Universidad Autónoma de Yucatán. Gabriel Murrieta Hernández, Universidad Autónoma de Yucatán. Alejandro Tapia González, Universidad Autónoma de Yucatán. Cristian Carrera Figueiras, Universidad Autónoma de Yucatán. Heriberto Hernández Cocoletzi, Benemérita Universidad Autónoma de Puebla. Ernesto Chigo Anota, Benemérita Universidad Autónoma de Puebla. Efraín Rubio Rosas, Benemérita Universidad Autónoma de Puebla. Enrique Vigueras Santiago, Universidad Autónoma del Estado de México. Romeo de Coss, Centro de Investigación y de Estudios Avanzados (Cinvestav-Mérida). Organizers: Organizers Sponsors: Sponsors

de Coss, Romeo; Murrieta-Hernández, Gabriel; Aguayo-González, Aarón; Rubio-Rosas, Efraín; Chigo-Anota, Ernesto; Vigueras-Santiago, Enrique

2013-06-01

252

Effects of coarse-graining on the scaling behavior of long-range correlated and anti-correlated signals  

NASA Astrophysics Data System (ADS)

We investigate how various coarse-graining (signal quantization) methods affect the scaling properties of long-range power-law correlated and anti-correlated signals, quantified by the detrended fluctuation analysis. Specifically, for coarse-graining in the magnitude of a signal, we consider (i) the Floor, (ii) the Symmetry and (iii) the Centro-Symmetry coarse-graining methods. We find that for anti-correlated signals coarse-graining in the magnitude leads to a crossover to random behavior at large scales, and that with increasing the width of the coarse-graining partition interval ?, this crossover moves to intermediate and small scales. In contrast, the scaling of positively correlated signals is less affected by the coarse-graining, with no observable changes when ?<1, while for ?>1 a crossover appears at small scales and moves to intermediate and large scales with increasing ?. For very rough coarse-graining ( ?>3) based on the Floor and Symmetry methods, the position of the crossover stabilizes, in contrast to the Centro-Symmetry method where the crossover continuously moves across scales and leads to a random behavior at all scales; thus indicating a much stronger effect of the Centro-Symmetry compared to the Floor and the Symmetry method. For coarse-graining in time, where data points are averaged in non-overlapping time windows, we find that the scaling for both anti-correlated and positively correlated signals is practically preserved. The results of our simulations are useful for the correct interpretation of the correlation and scaling properties of symbolic sequences.

Xu, Yinlin; Ma, Qianli D. Y.; Schmitt, Daniel T.; Bernaola-Galván, Pedro; Ivanov, Plamen Ch.

2011-11-01

253

Can protrusion of the tongue stop seizures in Rolandic epilepsy?  

PubMed

We report the case of a child with benign partial epilepsy with centro-temporal spikes (BECT) in whom protrusion of the tongue stopped the interictal abnormalities, and describe the polygraphic EEG recording of a seizure which terminated upon voluntary protrusion of the tongue. We mention the close link between the post-central (somatosensory) cortex and pre-central (motor) cortex, and how the primary sensory area has direct access to the motor cortex. We also examine how a tactile stimulus may provoke the inhibition of an epileptic discharge. PMID:10937156

Veggiotti, P; Beccaria, F; Gatti, A; Papalia, G; Resi, C; Lanzi, G

1999-12-01

254

Synthesis, characterization and catalytic properties of diorganotin derivatives. Crystal and molecular structure of the first complex of 2-(2-methyl-3-nitroanilino)benzoic acid of 1,2:3,4-di-?2-2-(2-methyl-3-nitroanilino)benzoato- O, O-1,3-bis-2-(2-methyl-3-nitroanilino)benzoato- O-1,2,4:2,3,4-di-?3-oxo-tetrakis[di-methyltin(IV)  

Microsoft Academic Search

The complexes [Me2(MNAB)SnOSn(MNAB)Me2]2 (2) and [Me2Sn(MNAB)2] (3), where HMNAB is 2-(2-methyl-3-nitroanilino)benzoic acid, (1), have been prepared and structurally characterized by means of vibrational, 1H and 13C NMR spectroscopies. The crystal structure of [Me2(MNAB)SnOSn(MNAB)Me2]2 has been determined by X-ray crystallography. Three distannoxane rings are present to the dimeric tetraorganodistannoxane of planar ladder arrangement. The structure is centro-symmetric and features a central

Vaso N. Dokorou; Dimitra Kovala-Demertzi; Maria Louloudi; Anca Silvestru; Mavroudis A. Demertzis

2008-01-01

255

The GTC scientific archive  

NASA Astrophysics Data System (ADS)

At present, data management in telescopes ofclass 8-10 meters is very inefficient. The Gran Telescopio Canarias(GTC) scientific archive that is being developed by the Centro deAstrobiología (CAB) in the framework of the Spanish Virtual Observatoryis aimed at avoiding this situation, providing the telescope with anarchive accessible via internet, guaranteeing the accessibility,efficiency, visibility and data security demanded by a telescope of itsentity. The GTC archive will also be adapted to the standards defined bythe International Virtual Observatory, maximizing the visibility of thedata produced by the telescope. The main characteristics of the GTCscientific archive are described in this poster.

Gutiérrez, R.; Solano, E.

2011-11-01

256

Earth observation photo taken by JPL with the Shuttle Imaging Radar-A  

NASA Technical Reports Server (NTRS)

Earth observation photo taken by the Jet Propulsion Laboratory (JPL) with the Shuttle Imaging Radar-A (SIR-A). This image shows a 50 by 100 kilometer (30 by 60 mile) area of the Imperial Valley in Southern California and neighboring Mexico. The checkered patterns represent agricultural fields where different types of crops in different stages of growth are cultivated. The very bright areas are (top left to lower right) the U.S. towns of Brawley, Imperial, El Centro, Calexico and the Mexican city of Mexicali. The bright L-shaped line (upper right) is the All-American water canal.

1981-01-01

257

Harmonic and seismic responses of a plate-column system on a tensionless Winkler foundation  

NASA Astrophysics Data System (ADS)

The responses of a plate-column system on a tensionless Winkler foundation subjected to free vibration, harmonic ground motion and to the El Centro 1940 earthquake are investigated. The governing equations of the system are solved numerically and the results are presented as figures to demonstrate the influence of the parameters of the system on the response. The influences of ground motion intensity and ratio of foundation stiffness to column stiffness are studied. The effects of the tensionless character of the foundation are identified.

Celep, Z.

1992-05-01

258

The New 40 Meter Radiotelescope of OAN at Yebes  

NASA Astrophysics Data System (ADS)

The Observatorio Astronómico Nacional (OAN) of Spain (Instituto Geográfico Nacional - Ministerio de Fomento) is building a new 40 meter parabolic radiotelescope in its premises at Centro Astronómico de Yebes (CAY), near Guadalajara, Spain. The instrument, whose construction is progressing well, is expected to be available for observations in 2004. The new radiotelescope will be equiped with state-of-the-art receivers in the 2 to 115 GHz range (including the geodetic S/X bands), and will join the astronomical and geodetic VLBI networks (EVN and IVS) from the start of its operations.

Colomer, Francisco

2001-12-01

259

The Palladiolibrary Geo-Models AN Open 3d Archive to Manage and Visualize Information-Communication Resources about Palladio  

NASA Astrophysics Data System (ADS)

The paper describes objectives, methods, procedures and outcomes of the development of the digital archive of Palladio works and documentation: the PALLADIOLibrary of Centro Internazionale di Studi di Architettura Andrea Palladio di Vicenza (CISAAP). The core of the application consists of fifty-one reality-based 3D models usable and navigable within a system grounded on GoogleEarth. This information system, a collaboration of four universities bearers of specific skills returns a comprehensive, structured and coherent semantic interpretation of Palladian landscape through shapes realistically reconstructed from historical sources and surveys and treated for GE with Ambient Occlusion techniques, overcoming the traditional display mode.

Apollonio, F. I.; Baldissini, S.; Clini, P.; Gaiani, M.; Palestini, C.; Trevisan, C.

2013-07-01

260

Radia2: A new tool for radiotherapy verification  

NASA Astrophysics Data System (ADS)

Radiotherapy is nowadays a proven technique in cancer treatments. Within the evolution of radiotherapy treatments towards more complex techniques, the need of new dosimetric methods for treatment verifications has appeared. In order to reach an improved dosimetric method, a collaboration was started to transfer knowledge from nuclear reaction instrumentation to medical applications, involving several departments from the University of Seville, Centro Nacional de Aceleradores (CNA), the Hospital Universitario Virgen Macarena and the company Inabensa. The first prototype, patent pending [2], gave very promising results. Currently, a critical review is being carried out to create an improved system.

Ovejero, M. C.; Vega-Leal, A. Pérez; Cortés-Giraldo, M. A.; Abou-Haidar, Z.; Bocci, A.; Gallardo, M. I.; Espino, J. M.; Álvarez, M. A. G.; Quesada, J. M.; Arráns, R.

2013-06-01

261

Predation of wild spider monkeys at La Macarena, Colombia.  

PubMed

The killing of an adult male spider monkey (Ateles belzebuth ) by a jaguar (Panthera onca) and a predation attempt by a puma (Felis concolor) on an adult female spider monkey have been observed at the CIEM (Centro de Investigaciones Ecológicas La Macarena), La Macarena, Colombia. These incidents occurred directly in front of an observer, even though it is said that predation under direct observation on any type of primate rarely occurs. On the basis of a review of the literature, and the observations reported here, we suggest that jaguars and pumas are likely to be the only significant potential predators on adult spider monkeys, probably because of their large body size. PMID:17342352

Matsuda, Ikki; Izawa, Kosei

2008-01-01

262

Comprehension Strategies and the Scientist's Notebook: Keys to Assessing Student Understanding  

NSDL National Science Digital Library

All across the country, educators are striving to build on the natural connections between science and literacy. The author's own work has brought together the best thoughts from two key efforts, which are described in this chapter. One is the scientist's notebook model developed by the El Centro School District (EBEC), which focuses on making meaning of the phenomenon being investigated and giving priority to evidence in responding to questions. The second is a way of having students take responsibility for their own learning through the explicit teaching of literacy strategies in the content areas. Both efforts are tied to the ways of thinking about thinking--metacognition.

Gilbert, Joan; Kotelman, Marleen; Saccani, Tony

2006-01-01

263

Identification of stability and control derivatives for AS 355 L2 helicopter with Quad-M/CTA methodology  

NASA Astrophysics Data System (ADS)

This work presents results obtained from a study of case for H-55 Helicopter System Identification which was carried out by an implementation of Quad-M Methodology purposed for Jategaonkar. The implementation performed was based on Cruz et al whose works were developed in Centro Técnico Aeroespacial (CTA). A comparison between Stability and Control Derivatives tables from these results and those from literature is performed for some important flight conditions. This comparison allows us to conclude about the reliability of the method, to present preliminary SCD tables for the studied aircraft and point to possible future works.

de Oliveira, Sérgio Servilha; Menegaldo, Luciano Luporini

2012-11-01

264

Radiobiological compensation: A case study of uterine cervix cancer with concurrent chemotherapy  

SciTech Connect

The case of a patient diagnosed with uterine cervix cancer is presented as an example of the clinical application of the radiobiological compensation method implemented at Centro Estatal de Cancerologia de Durango. Radiotherapy treatment was initially modified to compensate for the chemotherapy component and, as medical complications arose during treatment delivery resulting in an 18 days gap, new compensation followed. All physical and radiobiological assumptions to calculate the Biologically Effective Dose in the external beam and brachytherapy parts of the treatment are presented. Good local control of the tumor was achieved, the theoretical tolerance limits for the organs at risk were not surpassed and the patient manifested no extensive morbidity.

Herrera, Higmar; Yanez, Elvia; Lopez, Jesus [Centro Estatal de Cancerologia de Durango, Victoria de Durango, Durango (Mexico); ISSSTE General Hospital Dr. Santiago Ramon y Cajal, Victoria de Durango, Durango (Mexico)

2012-10-23

265

Solar central receiver reformer system for ammonia plants  

NASA Astrophysics Data System (ADS)

An overview of a study to retrofit the Valley Nitrogen Producers, Inc., El Centro, California 600 ST/SD Ammonia Plant with Solar Central Receiver Technology is presented. The retrofit system consists of a solar central receiver reformer (SCRR) operating in parallel with the existing fossil fired reformer. Steam and hydrocarbon react in the catalyst filled tubes of the inner cavity receiver to form a hydrogen rich mixture which is the syngas feed for the ammonia production. The SCRR system will displace natural gas presently used in the fossil reformer combustion chamber.

1980-07-01

266

Self-organization of developing embryo using scale-invariant approach  

Microsoft Academic Search

Background  Self-organization is a fundamental feature of living organisms at all hierarchical levels from molecule to organ. It has also\\u000a been documented in developing embryos.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  In this study, a scale-invariant power law (SIPL) method has been used to study self-organization in developing embryos. The\\u000a SIPL coefficient was calculated using a centro-axial skew symmetrical matrix (CSSM) generated by entering the components of

Ali Tiraihi; Mujtaba Tiraihi; Taki Tiraihi

2011-01-01

267

Current performance of the CAB robotic telescope: the road to high precision photometry  

NASA Astrophysics Data System (ADS)

The final limits of the photometric precision that may be achieved with a robotic telescope will depend upon the detection and control of all possible error sources. This involves efforts in mainly three related domains: instrumentation technology, calibration and data treatment. Here we will focus on the optimization of procedures for the automatic reduction of data taken with the 50-cm robotic telescope that is remotely operated at Centro de Astrobiología. The adopted strategies and the photometric precision achieved at different stages of the development of the project will be discussed, highlighting some of the main factors involved in past and future improvements.

Eibe, M. T.; Cuesta, L.; Ullán, A.; Pérez-Verde, A.; Navas, J.

268

Nutritive value of maize stover/pasture legume mixtures as dry season supplementation for sheep.  

PubMed

Two experiments were carried out to determine the nutrient contents and relative preferences of maize stover and three legumes forages and their feeding on intake and digestibility of sheep. Maize stover was blended with three legumes, stylo (Stylosanthes guainensis), siratro (Macroptilium atropurpureum) and centro (Centrocema pubescens), to produce four treatments, namely, only maize stover (control), stover/stylo, stover/siratro and stover/centro mixtures. The first experiment evaluated the relative preference of the stover and the various stover/legume mixtures when offered to sheep. Six rams were offered pair combinations of the treatments in a 6x6 Latin square with a split plot arrangement such that each ram had access to two feeds at a time in each period of 6 days. The second experiment included measurements of intake and digestibility of the stover and stover/legume mixtures. Four intact and four castrated male sheep were used in two, 4x4 Latin squares with 21-day periods. The least (P<0.05) preferred feed was maize stover when it was offered as the sole feed. There were no significant differences in preference among the stover/legume mixtures. Dry matter intake (DMI) was highest (P<0.05) when sheep were offered the stover/centro mixture and lowest (P<0.05) when maize stover was fed as the sole feed. Dry matter digestibility did not differ significantly among treatments. Sheep that were offered maize stover only lost weight, those fed stover/centro gained weight and those that were fed either stover/siratro or stover/stylo maintained weight. However, these short-term weight changes may reflect changes in fill as much as changes in body tissue. Addition of legumes to maize stover improved the nutritive value, possibly by increasing the nitrogen content of the stover. The results suggest that maize stover, which is normally left to rot in the field, could be better utilised by intercropping with legumes and allowing animals access after grain harvest. PMID:11323211

Undi, M; Kawonga, K C.; Musendo, R M.

2001-06-01

269

Studies on synthesis, growth, structural, optical properties of organic 8-hydroxyquinolinium succinate single crystals  

NASA Astrophysics Data System (ADS)

8-hydroxyquinolinium succinate (8HQSU), an organic material has been synthesized and single crystals were grown by employing the technique of slow evaporation. The structure of the grown crystal was elucidated by using single crystal X-ray diffraction analysis. 8HQSU crystal belongs to the monoclinic crystallographic system with non-centro symmetric space group of P21. FT-IR spectral investigation has been carried out to identify the various functional groups present in the grown crystal. UV-vis spectral studies reveal that 8HQSU crystals are transparent in the entire visible region and the cut-off wavelength has been found to be 220nm.

Thirumurugan, R.; Anitha, K.

2014-04-01

270

A new species of Mymarothecium and new host and geographical records for M. viatorum (Monogenea: Dactylogyridae), parasites of freshwater fishes in Brazil.  

PubMed

Mymarothecium boegeri sp. n. (Monogenea: Dactylogyridae) is described from the gills of Colossoma macropomum Cuvier (Characidae), collected from the aquaria of the "Centro de Pesquisas em Aquicultura, Departamento Nacional de Obras Contra as Secas (DNOCS)", Pentecoste City, State of Ceará, Brazil. Mymarothecium viatorum Boeger, Piasecki et Sobecka, 2002 is reported from the type host, Piaractus brachypomus (Cuvier) (Characidae) and from a new host, P. mesopotamicus (Holmberg) (Characidae), confirming the occurrence of M. viatorum in the Neotropical Region. The new species differs from the congeneric species in the structure of male copulatory complex; it is more closely related to M. viatorum by the presence of a posteromedial projection on ventral bar. PMID:16405294

Cohen, Simone Chinicz; Kohn, Anna

2005-11-01

271

Status of TJ-II project  

SciTech Connect

The flexible Heliac TJ-II is a medium six device (R=1.5m, [a]=0.2 m, B(0)=1.0 T) in an advanced stage of construction at Centro de Investigaciones Energeticas Medio Ambientales y Tecnologicas (CIEMAT), Madrid. The problems encountered during manufacturing so far have been solved satisfactorily. Nevertheless the narrow tolerances, which result from the compact machine design, create real challenges for all the component manufacturers. In this paper we present the present status of the project with a particular emphasis on the construction situation of the main components. 1 ref., 2 figs., 1 tab.

Alejaldre, C.; Blaumoser, M.; Almoguera, L. [Asociacion EURATOM-CIEMAT para Fusion, Madrid (Spain)] [and others

1995-04-01

272

Statistical Analysis of Random Number Generators  

NASA Astrophysics Data System (ADS)

In many applications, for example cryptography and Monte Carlo simulation, there is need for random numbers. Any procedure, algorithm or device which is intended to produce such is called a random number generator (RNG). What makes a good RNG? This paper gives an overview on empirical testing of the statistical properties of the sequences produced by RNGs and special software packages designed for that purpose. We also present the results of applying a particular test suite--TestU01-- to a family of RNGs currently being developed at the Centro Interdipartimentale Vito Volterra (CIVV), Roma, Italy.

Accardi, Luigi; Gäbler, Markus

2011-01-01

273

Role for A Kinase-anchoring Proteins (AKAPS) in Glutamate Receptor Trafficking and Long Term Synaptic Depression*  

PubMed Central

Expression of N-methyl d-aspartate (NMDA) receptor-dependent homosynaptic long term depression at synapses in the hippocampus and neocortex requires the persistent dephosphorylation of postsynaptic protein kinase A substrates. An attractive mechanism for expression of long term depression is the loss of surface AMPA (?-amino-3-hydroxy-5-methylisoxazale-4-propio-nate) receptors at synapses. Here we show that a threshold level of NMDA receptor activation must be exceeded to trigger a stable loss of AMPA receptors from the surface of cultured hippocampal neurons. NMDA also causes displacement of protein kinase A from the synapse, and inhibiting protein kinase A (PKA) activity mimics the NMDA-induced loss of surface AMPA receptors. PKA is targeted to the synapse by an interaction with the A kinase-anchoring protein, AKAP79/150. Disruption of the PKA-AKAP interaction is sufficient to cause a long-lasting reduction in synaptic AMPA receptors in cultured neurons. In addition, we demonstrate in hippocampal slices that displacement of PKA from AKADs occludes synaptically induced long term depression. These data indicate that synaptic anchoring of PKA through association with AKAPs plays an important role in the regulation of AMPA receptor surface expression and synaptic plasticity.

Crozier, Robert A.; Chen, Wendy S.; Scott, John D.; Bear, Mark F.

2014-01-01

274

Sobre el estado evolutivo de ? Pictoris  

NASA Astrophysics Data System (ADS)

Desde el descubrimiento de fuertes excesos infrarrojos en ? Pictoris, esta estrella ha sido muy estudiada y es considerada candidata a poseer un sistema planetario propio. ? Pic está rodeada de un disco asimétrico de polvo que se observa de canto y que esta vacío a distancias <= 40 AU. Esto se considera una fuerte evidencia en favor de la presencia de (al menos) un planeta gigante. Recientemente se han observado líneas de material circunestelar que se han interpretado como consecuencia de la caída de objetos cometarios sobre esta estrella. Recientemente se ha utilizado la existencia del disco de polvo para atribuir una edad corta (pre - secuencia principal) a ?Pic. Sin embargo, la evaporación de estos cometas provee suficiente polvo como para explicar la presencia del disco observado sin necesidad de edades cortas. En este trabajo mostramos que la comparación entre la tasa de impactos cometarios estimada en el Sistema Solar para diferentes etapas de su evolución y los datos observados en ? Pic indica edades avanzadas para ? Pic. Esta estimación debe tomarse con cautela ya que depende de la estructura de los sistemas planetarios. Además mostramos que, desde el punto de vista de la evolución estelar y con las incertezas presentes en la luminosidad y la temperatura efectiva, existe un continuo de edades posible para ? Pic. Sin embargo, empleando los datos provenientes de los flujos cometarios encontramos que una edad prolongada es consistente con ambos tratamientos.

Brunini, A.; Benvenuto, O. G.

275

Remontant erosion in desert soils of Tamaulipas, México.  

NASA Astrophysics Data System (ADS)

REMONTANT EROSION IN DESERT SOILS OF TAMAULIPAS MÉXICO Rivera-Ortiz, P.1; Andrade-Limas, E.1; De la Garza-Requena, F.1 and Castro-Meza, B.1 1Facultad de Ingeniería y Ciencias, Universidad Autónoma de Tamaulipas, México The degradation of soil reduces the capacity of soils to produce food and sustain life. Erosion is one of the main types of soil degradation. Hydric erosion of remontant type can occur in soils located close to the channel of a river through the expansion of a gully that begins as a fluvial incision over the ravine of one side of the river. The incision takes place at the point of greatest flow of runoff from areas adjacent to empty into the river. The depth of the incision causes the growth of the gully by collapse to move their heads back, upstream. The soil loss by remontant erosion on land use in agriculture and livestock was estimated in order to understand the evolution of gullies formed by this type of erosion. Through measurements on satellite images and GPS (Global Positioning System) two gullies, developed on alluvial soils which drain into the river Chihue, were studied. The investigation was conducted during 2003 to 2010 period in the municipality of Jaumave, Tamaulipas, in northeastern Mexico. Soil loss in gullies developed by remontant erosion was large and it was caused by soil collapse and drag of soil on the headers. The estimated loss of soil by remontant erosion was 3500 t in the deeper gully during 2010 and nearly 1200 t per year in the period 2003-2009. New sections of gully of about 20 m length, with more than 3 m deep and up to 13 m wide, were formed each year. This degradation has significantly reduced the productive surface of soil that for many years has been used to the cultivation of maize (Zea mays) and beans (Phaseolus vulgaris) as well as pasture production.

Rivera-Ortiz, P.; Andrade-Limas, E.; De la Garza-Requena, F.; Castro-Meza, B.

2012-04-01

276

[A new subspecies of Heraclides androgeus (Lepidoptera: Papilionidae) and its biogeographical aspects].  

PubMed

A new subspecies of Heraclides androgeus (Lepidoptera: Papilionidae) and its biogeographical aspects. Heraclides androgeus epidaurus was described and illustrated by Godman & Salvin in 1890 based on specimens obtained in Veracruz, indicating that their distribution encompassed both the Pacific and Atlantic sides of Mexico. Later authors commented that there were morphological differences between the male wings from both populations. We analyzed, described and nominated Heraclides androgeus reyesorum ssp. nov. Vargas, Llorente & Luis distributed in the Mexican Pacific coast, based on 62 specimens, and compared it with H a. epidaurus from the Gulf of Mexico, based on more than 200 specimens housed at UNAM: Museo de Zoología, Facultad de Ciencias and the Colección Nacional de Insectos of the Instituto de Biologia, as well as some collections from the USA. The main characters were the width of the yellow and black bands on forewings in males, which had a significant difference between the populations of both sides of Mexico, although some characters were variable and showed partial overlap. In the hindwings, the differences were the extent of the subterminal lunules in dorsal and ventral view. We also analyzed the male genitalia, finding notorious differences in both sclerotic processes of the harpe. Subspecific differences between females refer to the brightness and extent of green spots on the hindwings and the extent of lunules in the ventral view. The greatest abundance of H. a. reyesorum ssp. nov. was in the tropical deciduous forest, with gallery forest and in the lower range of the cloud forest, present at altitudes of 500-800 m and 1000-1 750 m, respectively. We discussed the pattern of endemism due to historical vicariant processes and explain the presence of the new subspecies of H. androgeus and other taxa of specific level. PMID:23885585

Vargas-Fernández, Isabel; Luis-Martínez, Armando; Llorente-Bousquets, Jorge

2013-06-01

277

Integrated passive/active vibration absorber for multi-story buildings  

NASA Technical Reports Server (NTRS)

Passive isolator, active vibration absorber, and an integrated passive/active (hybrid) control are studied for their effectiveness in reducing structural vibration under seismic excitations. For the passive isolator, a laminated rubber bearing base isolator which has been studied and used extensively by researchers and seismic designers is considered. An active vibration absorber concept, which can provide guaranteed closed-loop stability with minimum knowledge of the controlled system, is used to reduce the passive isolator displacement and to suppress the top floor vibration. A three-story building model is used for the numerical simulation. The performance of an active vibration absorber and a hybrid vibration controller in reducing peak structural responses is compared with the passively isolated structural response and with absence of vibration control systems under the N00W component of El Centro 1940 and N90W component of the Mexico City earthquake excitation records. The results show that the integrated passive/active vibration control system is most effective in suppressing the peak structural acceleration for the El Centro 1940 earthquake when compared with the passive or active vibration absorber alone. The active vibration absorber, however, is the only system that suppresses the peak acceleration of the structure for the Mexico City 1985 earthquake.

Lee-Glauser, Gina J.; Ahmadi, Goodarz; Horta, Lucas G.

1995-01-01

278

Optimum parameters of Maxwell model-defined dampers used to link adjacent structures  

NASA Astrophysics Data System (ADS)

The analytical formulas for determining optimum parameters of Maxwell model-defined fluid dampers used to link two adjacent structures are derived in this paper using the principle of minimizing the averaged vibration energy of either the primary structure or the two adjacent structures under a white-noise ground excitation. Each structure is modelled as a single-degree-of-freedom system, which is connected to the other structure through a Maxwell model-defined fluid damper. The derived formulas explicitly express the optimum parameters of the fluid damper, i.e., the relaxation time and the damping coefficient at zero frequency, as the functions of the frequency and mass ratios of two adjacent structures. The dynamic analysis shows that the fluid damper of optimum parameters can significantly reduce the dynamic responses of most adjacent structures under the white-noise ground excitation. The fluid damper of optimum parameters is then applied to the adjacent structures subjected to either a filtered white-noise ground excitation or the El Centro 1940 NS ground excitation. The results demonstrate that the fluid damper of optimum parameters derived based on the white-noise ground excitation is also beneficial to reduce the responses of the adjacent structures under the filtered white-noise ground excitation and the El Centro ground excitation.

Zhu, H. P.; Xu, Y. L.

2005-01-01

279

Central radio galaxies in groups: cavities, bubbles and the history of AGN heating  

NASA Astrophysics Data System (ADS)

E' noto che le regioni centrali degli ammassi e gruppi di galassie costituiscono un ambiente in cui gas caldo e plasma radioemittente proveniente dalle galassie dominanti interagiscono tra loro. In particolare, si pensa che la radioemissione dell'AGN centrale ed i suoi possibili cicli di attivita', siano strettamente legati alla presenza di cavita' e "bubbles" nel gas intergalattico. Si presentera' lo status di un progetto osservativo effettuato con il Giant Metrewave Radio Telescope (GMRT, India) su di un campione di 18 gruppi di galassie, osservati a tre frequenze radio (235 MHz, 325 MHz e 610 MHz). Lo studio della morfologia radio degli AGN centrali e la relativa analisi spettrale permettono di ottenere stime sull'eta' di questi oggetti, e sulla loro energia totale, che a loro volta sono in relazione con le proprieta' X dei gruppi stessi. Per tutti gli oggetti del campione sono disponibili osservazioni Chandra di proprieta'. Per due oggetti del campione, 4C+24.36 (al centro di AWM04) e NGC741 (al centro di RSOG17) verra' presentato uno studio dettagliato.

Giacintucci, S.; Venturi, T.; Raychaudhury, S.; Vrtilek, J.

2008-10-01

280

Molecular Patterns of Alkyl-Aryl Amides Self-assembled on a Graphite Surface  

NASA Astrophysics Data System (ADS)

A series of amides having an alkyl chain and an aromatic head group has been prepared and their self-assembled molecular patterns on a graphite surface have been observed by scanning tunneling microscopy (STM). The molecular patterns generated appear to be defined by the relative location of the alkyl chain and aromatic ring with respect to the amide group. Thus, the molecular axis of amides derived from aromatic carboxylates and alkylamines appears to be inclined toward the lamella boundary at an angle of approximately 70°, forming mirror-image chiral domains. In contrast, the amides obtained from aromatic amines and alkyl carboxylate give a centro-symmetric molecular pattern where the molecular axis is at right angles to the lamella boundary. The relationship between the molecular ordering pattern and the structural feature of constituent molecules has been discussed.

Nanjo, Hiroshi; Qian, Pu; Yokoyama, Toshiro; Suzuki, Toshishige M.

2003-10-01

281

The Experimental Discovery of Double-Charm Baryons  

NASA Astrophysics Data System (ADS)

In 2002, the SELEX [The SELEX (Fermilab E781) Collaboration: Ball State University, Bogazici University, Carnegie-Mellon University, Centro Brasileiro de Pesquisas Fisicas, Fermilab, Institute For High Energy Physics (Protvino), Institute of High Energy Physics (Beijing), Institute of Theoretical and Experimental Physics (Moscow), Max-Planck-Institute for Nuclear Physics, Moscow State University, Petersburg Nuclear Physics Institute, Tel Aviv University, Universidad Autónoma de San Luis Potosí, Universidade Federal da Paraíba, H. H. Wills Physics Laboratory, University of Bristol, University of Iowa, University of Michigan-Flint, University of Rochester, University of Rome La Sapienza and INFN, University of São Paulo, University of Trieste and INFN. http://www-selex.fnal.gov] Experiment (Fermilab E781) reported the first observation of a member of the family of doubly charmed baryons [SELEX Collaboration, M. Mattson et al.: First observation of the doubly charmed baryon?cc+. Phys. Rev. Letters 89 (2002) 112001, [ arXiv:hep-ex/0208014

Engelfried, Jürgen; Selex Collaboration

282

Amplification of in-plane seismic ground motion by group cavities in layered half-space (I)  

NASA Astrophysics Data System (ADS)

Amplification of in-plane seismic ground motion by underground group cavities in layered half-space is studied both in frequency domain and time domain by using indirect boundary element method (IBEM), and the effect of cavity interval and spectrum of incident waves on the amplification are studied by numerical examples. It is shown that there may be large interaction between cavities, and group cavities with certain intervals may have significant amplification to seismic ground motion. The amplification of PGA (peak ground acceleration) and its PRS (peak response spectrum) can be increased up to 45.2% and 84.4%, for an example site in Tianjin, under the excitation of Taft wave and El Centro wave; and group cavities may also affect the spectra of the seismic ground motion. It is suggested that the effect of underground group cavities on design seismic ground motion should be considered.

Liang, Jianwen; Zhang, Ji; Ba, Zhenning

2012-08-01

283

Optimal sliding mode control of single degree-of-freedom hysteretic structural system  

NASA Astrophysics Data System (ADS)

This paper addresses the controller design problem of a nonlinear single degree-of-freedom structural system excited by the earthquake. Bouc-Wen model, as an efficient hysteresis modeling method, is used to model the system nonlinearity. Sliding mode control (SMC), due to its robustness in dealing with uncertainty, is utilized as the main control strategy. An optimal sliding surface is presented which minimizes the displacement and control force in terms of a quadratic cost function. Two numerical examples are given to illustrate the effectiveness of the proposed strategy subject to three earthquakes of El-Centro, Rinaldi and Kobe. Simulation results show a significant and considerable reduction in structural response and indicate that the performance of suggested optimal SMC strategy is remarkable.

Baradaran-nia, Mehdi; Alizadeh, Ghasem; Khanmohammadi, Sohrab; Farahmand Azar, Bahman

2012-11-01

284

Observaciones del disco solar y de una protuberancia quiescente en radiación ultravioleta  

NASA Astrophysics Data System (ADS)

Observaciones del disco solar y de una protuberancia quiescente en el rango de longitudes de onda ultravioleta fueron obtenidas con el instrumento CDS (Coronal Diagnostic Spectrograph) y SUMER (Solar Ultraviolet Measurements of emitted radiation) a bordo de la sonda SOHO. El propósito es investigar las velocidades macroscópicas de varias especies metálicas que se observan tanto en el disco solar como en el plasma de las protuberancias. Para calcular las velocidades del disco solar aplicamos una técnica mixta para modelar la distribución de estructuras en UV en el Sol quieto. Las velocidades macroscópicas en las protuberancias se calcularon a partir de los corrimientos Doppler en cada línea espectral y luego se tomaron las del disco solar como referencia. Obtuvimos valores absolutos para las velocidades macroscópicas entre 5 y 40 km/seg. También detectamos comportamientos diferentes en las velocidades de las protuberancias en el centro con respecto a los bordes.

Cirigliano, D.; Vial, J.-C.; Rovira, M.

285

An Active Control Algorithm to Prevent the Pounding of Adjacent Structures  

NASA Astrophysics Data System (ADS)

Since the adjacent structures can collide due to their out-of-phase vibration, structural pounding is an additional problem except for the other harmful damage that occurs during the earthquake vibrations. In this study, a simple active control algorithm which results in an asymptotically stable system is proposed for adjacent structures. To be able to prevent a possible pounding, proposed control is calculated based on the measured relative displacement of the structures. The structural responses of the example structure subjected to El Centro ground motion are investigated for optimal passive control and proposed control and compared to uncontrolled case. It is shown by numerical results that the proposed active control algorithm can reduce the response of the adjacent structures under the earthquake forces and prevent pounding.

Aldemir, Ünal; Aydin, Ersin

286

On the Use of TMDs for Regular Buildings and Bridges under Dynamic Actions  

NASA Astrophysics Data System (ADS)

Some R&D done recently at FEUP, under control of vibrations using TMDs is described. The first part of this study is a parametric analysis of the performance of a TMD in the mitigation of the effects of earthquakes in building-like structures. The targeted parameters in the analyses were the number of storeys of the buildings, the mass ratio ? of the TMD, and the earthquake input signals. The number of storeys of the buildings varied from 5 to 30 with increments of 5 storeys. The mass ratio of the TMD varied from 0.00 to 0.05 with increments of 0.01. The actions considered were the 1951 El Centro earthquake and the 1995 Kobe earthquake. The second part of the study addresses the control of vibrations of a pedestrian bridge at Porto under excitations produced by the pedestrians themselves.

Moura Paredes, Miguel; de Barros, Rui Carneiro

2010-05-01

287

Dynamic response of a column with foundation uplift  

NASA Astrophysics Data System (ADS)

The effects of transient foundation uplift on the dynamic response of a column with attached masses supported on a Winkler foundation are investigated. The analysis developed here is based on the assumption that the column, having continuously distributed mass and rigidity, is supported on a tensionless elastic foundation through a rigid circular base plate. The method employed includes use of series expansion of the lateral displacement of the column, application of the Galerkin technique and step-wise solution of the governing equations of the problem. Besides the free vibrations of the column, the forced vibrations of the system are investigated for an assumed harmonic ground motion excitation. Additionally, the dynamic response of the system to the El Centro 1940 ground motion is presented.

Celep, Z.; Güler, K.

1991-09-01

288

The responses of a building on sliding pads to two earthquake models  

NASA Astrophysics Data System (ADS)

The equivalent linearization procedure has established that a mass-dashpot system can be used as a simple model for considering seismic isolation of buildings on sliding pads. In this paper, expressions are developed for time-dependent mean-square responses of the dashpot system to two earthquake models. One model is the response of a linear spring-dashpot system to a stationary white input, where the input is turned on at t = 0. The other model is the statistically stationary response of the same single degree-of-freedom system to the same white input, where the response is turned on to the mass-dashpot system at t = 0. Calculations with likely values for the parameters showed little difference between these two excitations. Based on these results, with the El Centro, California, earthquake taken as an example, the attenuation of the acceleration by the sliding pads and the maximum displacement of the structure are estimated.

Noguchi, T.

1985-12-01

289

Seismic behavior of concrete filled steel tubular arch structures  

NASA Astrophysics Data System (ADS)

Shaking table tests of a 1:10 scale arch model performed to investigate the seismic behavior and resistance of concrete filled steel tubular (CFT) arch structures are described in this paper. The El-Centro record and Shanghai artificial wave were adopted as the input excitation. The entire test process can be divided into three stages depending on the lateral brace configurations, i.e., fully (five) braced, two braces removed, and all braces removed. A total of 46 tests, starting from the elastic state to failure condition, have been conducted. The natural vibration frequencies, responses of acceleration, displacement and strain were measured. From the test results, it is demonstrated that the CFT arch structures are capable of resisting severe ground motions and that CFT arches offer a credible alternative to reinforced concrete arches, especially in regions of high seismic intensity.

Feng, Xiong; Kunnath, Sashi K.; Haowu, Liu

2005-06-01

290

Robust H ? control for aseismic structures with uncertainties in model parameters  

NASA Astrophysics Data System (ADS)

This paper presents a robust H ? output feedback control approach for structural systems with uncertainties in model parameters by using available acceleration measurements and proposes conditions for the existence of such a robust output feedback controller. The uncertainties of structural stiffness, damping and mass parameters are assumed to be norm-bounded. The proposed control approach is formulated within the framework of linear matrix inequalities, for which existing convex optimization techniques, such as the LMI toolbox in MATLAB, can be used effectively and conveniently. To illustrate the effectiveness of the proposed robust H ? strategy, a six-story building was subjected both to the 1940 El Centro earthquake record and to a suddenly applied Kanai-Tajimi filtered white noise random excitation. The results show that the proposed robust H ? controller provides satisfactory results with or without variation of the structural stiffness, damping and mass parameters.

Song, Gang; Lin, Jiahao; Zhao, Yan; Paul Howson, W.; Williams, Fred W.

2007-12-01

291

Application of wireless sensing and control system to control a torsion-coupling building with MR-dampers  

NASA Astrophysics Data System (ADS)

This study examines the potential use of wireless communication and embedded computing technologies within realtime structural control applications. Based on the implementation of the prototype WiSSCon system in a three story steel test structure with significant eccentricity, the centralized control architecture is implemented to mitigate the lateral and torsional response of the test structure using two MR dampers installed in the first story. During the test, a large earthquake time history is applied (El Centro earthquake) at the structure base using a shaking table. Three major performance attributes of the wireless control system were examined: (1) validation of the reliability of wireless communications for real-time structural control applications, (2) validation of a modified exponential damper model embedded in the wireless sensors to operate the MR dampers, and (3) exploration of control effectiveness when using WiSSCon in a centralized architectural configuration.

Hsu, Sung-Chieh; Lu, Kung-Chun; Lin, Pei-Yang; Loh, Chin-Hsiung; Lynch, Jerome P.

2007-05-01

292

Home Technology Integration Learning Activity Module 7  

NSDL National Science Digital Library

This series of resources, a part of the Convergence Technology Center (CTC) ATE Center Home Technology Integration Curriculum, focuses on practical aspects of home technology. This document will allow students to learn about "video camera installation by following the lab instructions." The module explains almost every conceivable step in installing this piece of video technology. Authored by Julian Carranza, faculty member of El Centro College, the lesson is a step-by-step process in using these materials. Each step is followed by a detailed jpeg. The page does require a free login to access this material. This can be done easily with an email address. Additionally, visitors can find an assessment to accompany this lesson here.

Carranza, Julian

2011-09-19

293

Linear models to predict the nonlinear seismic behavior of a one-story steel frame  

NASA Astrophysics Data System (ADS)

Six methods of linearization are used to construct various equivalent linear models to predict the nonlinear seismic behavior of a one-story steel frame. Four of the methods depend on the restoring force-displacement relation of the frame. Two bilinear models are constructed; one to represent the elastic-plastic nature of the structural steel, the other to represent the work hardening nature. Both bilinear models reproduce the response time histories quite accurately in the domain appropriate to each. The models are assessed by comparing their response predictions with the measured response for the El Centro. Pacoima, Taft and Parkfield excitations. It is shown that the dependence of the nonlinear response of a structure on the characteristics of the earthquake excitation is so complex that there is no way that the linearization schemes considered can have the required generality to limit the maximum displacement response to a specified value.

Valdimarsson, H.; Shah, A. H.; McNiven, H. D.

1981-09-01

294

Seismic response of bridge piers on elasto-plastic Winkler foundation allowed to uplift  

NASA Astrophysics Data System (ADS)

When the bridge piers with shallow foundation are subject to intensive earthquake excitations, uplift of foundations will occur and the foundation soil will partly become plastic. It is very difficult to use an accurate method to simulate the uplifting and yielding of supporting soil. An improved Winkler foundation model, which could be used to consider the uplift and yield, was employed in the analysis. The 1940 El Centro earthquake record is inputted to a rigid pier with shallow foundation so that the non-linear history response is obtained. From the non-linear analysis, it is concluded that the non-linear effect is very remarkable when uplifting and yielding of supporting soil are considered. Compared with the linear analysis, the stiffness of bridge pier-soil system degrades in each cycle after considering uplifting and yielding. It is shown that the non-linear analysis can get larger rotational angles and smaller bending moments compared with the linear analysis.

Chen, Xing-Chong; Lai, Yuan-Ming

2003-10-01

295

Development flight tests of the Viking decelerator system.  

NASA Technical Reports Server (NTRS)

Significant aspects of a low altitude flight test phase of the overall Viking decelerator system development are given. This test series included nine aircraft drop tests that were conducted at the Joint Parachute Test Facility, El Centro, California, between September 1971 and May 1972. The test technique and analytical planning method utilized to best simulate loading conditions in a low density environment are presented and some test results are shown to assess their adequacy. Performance effects relating to suspension line lengths of 1.7 D sub o with different canopy loadings are noted. System hardware developments are described, in particular the utilization of a fabric deployment mortar cover which remained attached to the parachute canopy. Finally, the contribution of this test series to the overall program is assessed.

Murrow, H. N.; Eckstrom, C. V.; Henke, D. W.

1973-01-01

296

A High Resolution Phoswich Detector: LaBr{sub 3}(Ce) Coupled With LaCl{sub 3}(Ce)  

SciTech Connect

An innovative solution for the forward end-cap CALIFA calorimeter of R{sup 3}B is under investigation consisting of two scintillation crystals, LaBr{sub 3} and LaCl{sub 3}, stacked together in a phoswich configuration with one readout only. This dispositive should be capable of a good determination of the energy of protons and gamma radiation. This composite detector allows to deduce the initial energy of charged particles by DELTAE1+DELTAE2 identification. For gammas, the simulations show that there is a high probability that the first interaction occurs inside the scintillator at few centimeters, with a second layer, the rest of the energy is absorbed, or it can be used as veto event in case of no deposition in the first layer. One such a detector has been tested at the Centro de MicroAnalisis de Materiales (CMAM) in Madrid. Good resolution and time signal separation have been achieved.

Carmona-Gallardo, M.; Borge, M. J. G.; Briz, J. A.; Gugliermina, V.; Perea, A.; Tengblad, O.; Turrion, M. [Instituto de Estructura de la Materia, CSIC. C/Serrano, 113-bis, E-28006 Madrid (Spain)

2010-04-26

297

Materials research at CMAM  

SciTech Connect

The Centro de Micro Analisis de Materiales (CMAM) is a research centre of the Universidad Autonoma de Madrid dedicated to the modification and analysis of materials using ion beam techniques. The infrastructure, based on a HVEE 5MV tandem accelerator, provided with a coaxial Cockcroft Walton charging system, is fully open to research groups of the UAM, to other public research institutions and to private enterprises. The CMAM research covers a few important lines such as advanced materials, surface science, biomedical materials, cultural heritage, materials for energy production. The Centre gives as well support to university teaching and technical training. A detail description of the research infrastructures and their use statistics will be given. Some of the main research results will be presented to show the progress of research in the Centre in the past few years and to motivate the strategic plans for the forthcoming.

Zucchiatti, Alessandro [Centro de Micro Analisis de Materiales CMAM, Universidad Autonoma de Madrid, c/ Faraday 3, 28049 Madrid (Spain)

2013-07-18

298

Involvement of users and relatives in mental health service evaluation.  

PubMed

Although Italian mental health (MH) services are community based, user and relative participation in service evaluation lagged behind until lately. We here review three recent studies involving stakeholder participation in service evaluation: two were quantitative studies, one on 204 users in an MH service in Pistoia (Central Italy) and the other on 2259 relatives, conducted with the National Union of Associations for Mental Health. The third (supported by The Centro per il Controllo delle Malattie, the ministerial Center for Disease Control) was a qualitative study in seven MH services, involving users, relatives, and professionals together, which collected interviews from 136 users, 119 relatives, and 79 professionals. In the quantitative studies, positive evaluations outnumbered negative ones. The qualitative study explored negative aspects in greater depth. Common findings were insufficient information, underinvolvement of users-relatives in planning, no choice of clinician, psychiatrist domination, and limited helpfulness of interventions. With stakeholder participation in service evaluation, the present medical framework will need reshaping. PMID:24886948

Barbato, Angelo; D'Avanzo, Barbara; D'Anza, Vito; Montorfano, Emanuele; Savio, Monica; Corbascio, Caterina G

2014-06-01

299

West Nile Virus in California  

PubMed Central

West Nile virus (WNV) was first isolated in California during July 2003 from a pool of Culex tarsalis collected near El Centro, Imperial County. WNV transmission then increased and spread in Imperial and Coachella Valleys, where it was tracked by isolation from pools of Cx. tarsalis, seroconversions in sentinel chickens, and seroprevalence in free-ranging birds. WNV then dispersed to the city of Riverside, Riverside County, and to the Whittier Dam area of Los Angeles County, where it was detected in dead birds and pools of Cx. pipiens quinquefasciatus. By October, WNV was detected in dead birds collected from riparian corridors in Los Angeles, west to Long Beach, and through inland valleys south from Riverside to San Diego County. WNV was reported concurrently from Arizona in mid-August and from Baja, Mexico, in mid-November. Possible mechanisms for virus introduction, amplification, and dispersal are discussed.

Lothrop, Hugh; Chiles, Robert; Madon, Minoo; Cossen, Cynthia; Woods, Leslie; Husted, Stan; Kramer, Vicki; Edman, John

2004-01-01

300

Study of deformation and shape recovery of NiTi nanowires under torsion.  

PubMed

The nanomechanical properties, deformation, and shape recovery mechanism of NiTi nanowires (NWs) under torsion are studied using molecular dynamics simulations. The effects of loading rate, aspect ratio of NWs, and NW shape are evaluated in terms of atomic trajectories, potential energy, torque required for deformation, stress, shear modulus, centro-symmetry parameter, and radial distribution function. Simulation results show that dislocation nucleation starts from the surface and then extends to the interior along the {110} close-packed plane. For a high loading rate, the occurrence of torsional buckling of a NW is faster, and the buckling gradually develops near the location of the applied external loading. The critical torsional angle and critical buckling angle increase with aspect ratio of the NWs. Square NWs have better mechanical strength than that of circular NWs due to the effect of shape. Shape recovery naturally occurs before buckling. PMID:23329144

Wu, Cheng-Da; Sung, Po-Hsien; Fang, Te-Hua

2013-04-01

301

Design, construction and test of mercury thermometric cell in CENAMEP AIP  

NASA Astrophysics Data System (ADS)

We present the results of the design, construction, filling and test of thermometric cell, to reproduce the triple point of mercury in the Temperature Laboratory of Centro Nacional de Metrología de Panamá AIP (CENAMEP AIP). This cell will be included in the group of thermometric cells of the laboratory. With this cell CENAMEP-AIP is covering the -39 °C to 660 °C range. This new cell offers the opportunity to reproduce the primary temperature defined by ITS-90 of -38.8344 ° C, and was built with 0.68 kg of mercury ultra-pure certified by the National Institute of Standards and Technology from United States (NIST-EEUU). The reproducibility obtained with thermometric cell of mercury is approximately one thousandth of kelvin (1 mK). This value satisfies according to current laboratory equipment.

Ortega-Cortés, R.; Méndez-Lango, E.; Araolaza-Rodriguez, A.

2013-09-01

302

First International Conference between West and East--Leonardo and Lao-Tze. Western Science Meets Eastern Wisdom. Experiences of Scientists and Intellectuals for the Creation of a New Paradigm of Modern Science  

PubMed Central

The Conference was organized and supported by: Nei Dan School (European School of Internal Martial Arts), NIB (Laboratory of Molecular Biology and Stem Cell Bioengineering, National Institute of Biostructures and Biosystems, Institute of Cardiology, S.Orsola-Malpighi Hospital, Bologna), WACIMA (Worldwide Association Chinese Internal Martial Arts), Arti D’Oriente (Magazine of Eastern culture and traditions), Nuovo Orizzonte (Taiji Quan School in Florence), Samurai (Journal on Martial Arts), and Pinus (First National Institute for the Unification of Medical Strategies). Nei Dan School (www.taichineidan.com, neidan@libero.it) was in charge of the organization. Future meetings of the Centro studi ‘Tao and Science’ will take place in spring 2007 in Firenze and in October 2007 in Bologna. For information: E-mail: neidan@libero.it; web site: www.taichineidan.com, www.taoandscience.com

2008-01-01

303

Selective mutism and abnormal electroencephalography (EEG) tracings.  

PubMed

Epileptic discharges are not considered a part of the clinical picture of selective mutism, and electroencephalography is generally not recommended in its work-up. This report describes 6 children with selective mutism who were found to have a history of epilepsy and abnormal interictal or subclinical electroencephalography recordings. Two of them had benign epilepsy of childhood with centro-temporal spikes. The mutism was not related in time to the presence of active seizures. While seizures could be controlled in all children by medications, the mutism resolved only in 1. Although the discharges could be coincidental, they might represent a co-morbidity of selective mutism or even play a role in its pathogenesis. Selective mutism should be listed among the psychiatric disorders that may be associated with electroencephalographic abnormalities. It can probably be regarded as a symptom of a more complicated organic brain disorder. PMID:21596703

Politi, Keren; Kivity, Sara; Goldberg-Stern, Hadassa; Halevi, Ayelet; Shuper, Avinoam

2011-11-01

304

Control of structures featuring a new MRE isolator system  

NASA Astrophysics Data System (ADS)

This study is focused on control of a scaled building structure using a new semi-active Variable Stiffness and Damping Isolator (VSDI). The proposed VSDI system consists of a traditional steel-rubber vibration absorber, and a magnetorhelogical elastomer (MRE) with a controllable stiffness and damping behavior. To demonstrate the feasibility of using VSDIs a 1:16 scaled, three-story building is constructed and installed on a shake table and its base is supported by four prototype VSDIs. The VSDIs can be regulated in real time by varying the applied magnetic field through a controller. A phenomenological model is proposed and implemented on VSDI devices. The scaled El Centro earthquake excitation is applied to the system, and the vibration mode is controlled by a Lyapunov-based control strategy. Results show that the a significant reduction in structural response can be achieved for both displacement and acceleration.

Behrooz, Majid; Wang, Xiaojie; Gordaninejad, Faramarz

2012-03-01

305

State-selective electron capture in {sup 3}He{sup 2+} + He collisions at intermediate impact energies  

SciTech Connect

In this work we have measured single-electron capture in collisions of {sup 3}He{sup 2+} projectiles incident on a helium target for energies of 13.3-100 keV/amu with the cold-target recoil-ion momentum spectroscopy setup implemented at the Centro Atomico Bariloche. State-selective single-capture cross sections were measured as a function of the impact energy. They were found to agree with previous existing data from the Frankfurt group, starting at the impact energy of 60 keV/amu; as well as with recent data, at 7.5 keV/amu, from the Lanzhou group. The present experimental results are also contrasted to the classical trajectory Monte Carlo method with dynamical screening.

Alessi, M. [Instituto Balseiro, Av. E. Bustillo 9500, 8400 San Carlos de Bariloche (Argentina); Centro Atomico Bariloche, Av. E. Bustillo 9500, 8400 San Carlos de Bariloche (Argentina); Otranto, S. [CONICET and Departamento de Fisica Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahia Blanca (Argentina); Focke, P. [Centro Atomico Bariloche, Av. E. Bustillo 9500, 8400 San Carlos de Bariloche (Argentina)

2011-01-15

306

Enrichment, concentration and retention processes in relation to anchovy ( Engraulis ringens) eggs and larvae distributions in the northern Humboldt upwelling ecosystem  

NASA Astrophysics Data System (ADS)

A Lagrangian model is used to simulate and quantify in the northern Humboldt upwelling ecosystem the processes of enrichment, concentration and retention, identified by Bakun [Bakun, A., 1996. Patterns in the ocean. Ocean processes and marine population dynamics. University of California Sea Grant, California, USA, in cooperation with Centro de Investigaciones Biologicas de Noroeste, La Paz, Baja California Sur, Mexico, 323 pp.] as being important for the survival and recruitment of early life stages of pelagic fish. The method relies on tracking the positions of particles within water velocity fields generated by a three-dimensional hydrodynamic model. Simple criteria for considering particles as participating to enrichment, concentration or retention are used to derive indices of the three processes. We analyse the spatial distribution of and seasonal variability in these indices. The results are discussed in relation to anchovy ( Engraulis ringens) eggs and larvae distributions off Peru, and to a comparable study conducted in the southern Benguela upwelling ecosystem.

Lett, Christophe; Penven, Pierrick; Ayón, Patricia; Fréon, Pierre

2007-01-01

307

Aerosol and Water Vapor Raman Lidar System at CEILAP, Buenos Aires, Argentina. Case Study: November 07, 2006.  

NASA Astrophysics Data System (ADS)

A multiwavelength backscatter LIDAR (Light Detection And Ranging) was developed and operates at Centro de Investigaciones en Láseres y Aplicaciones, CEILAP (CITEFA-CONICET), (34.5 S and 58.5 W) to study the atmospheric properties such as the aerosol optical parameters, the boundary layer evolution, and the water vapor vertical distribution. The emission system is based on a Nd:YAG laser emitting at the fundamental, second and third harmonic wavelengths. The reception unit was upgraded to collect the atmospheric elastic and nitrogen Raman backscatters from the second and third harmonic wavelength and the water vapor Raman backscatter from the third harmonic wavelength. The information from all these channels give us enough information to derive the vertical distribution of the total to molecular backscatter, the backscatter to extinction ratio (lidar ratio) and the A?ngström coefficient. In addition, water vapor mixing ratio profile is also measured by using the Raman water vapor and nitrogen channels (408 and 387 nm).

Otero, Lidia Ana; Ristori, Pablo Roberto; Quel, Eduardo Jaime

2008-04-01

308

Medical experiments on human beings.  

PubMed Central

Throughout the scientific age it has been increasingly realised that the path to knowledge is through carefully-controlled experimentation. Medicine must never, however, treat human beings as objects, or as the means to achieving increased knowledge. Ultimately the goal of human evolution will be served by the willing collaboration of members of society in the advancement of knowledge through carefully planned experimentation. As of now, however, many safeguards must be built into the system to ensure that no exploitation occurs. Experimenters are charged with the task of designing the most ingenious experiments, to give maximum information with a minimum of trauma and always to ensure the fully informed consent of the participants. This paper was read to a conference on human rights in relation to forensic science organised by Centro Internazionale di Richerche e Studi Penale e Penitanziari, in cooperation with UNESCO, held in Messina, Italy, in March 1980.

Towers, B

1981-01-01

309

Phosphorus in the environment  

NASA Astrophysics Data System (ADS)

IsoPhos 2012: Development of Isotopic Tracers for a Better Understandingof the Phosphorus Cycle;Monte Verità, Switzerland, 24-29 June 2012 IsoPhos 2012, a conference dedicated to cutting-edge research on phosphorus, was held in the Centro Stefano Franscini of the Swiss Federal Institute of Technology of Zurich (ETH Zurich). It gathered 63 scientists, 11 of whom were graduate students, from 16 countries and different areas of expertise, including Earth sciences, oceanography, paleontology, microbiology, soil and plant sciences, and hydrology. The conference focused on the use of stable oxygen isotopes in phosphate. New developments in preparation and analytical techniques have made the application of this tracer viable for fields other than paleoclimatology. However, new challenges with respect to sample preparation, standardization, its use in conjunction with other tracers, and the effect of biochemical processes have arisen.

Tamburini, F.; Bernasconi, S. M.; Paytan, A.

2012-10-01

310

Electrophysiological evidence for a two-stage process underlying single chord priming.  

PubMed

In this study, we examine through electrophysiological measures three alternative mechanisms underlying musical chord priming: psychoacoustic distance, common parent-key, and distance along the circle of fifths. In contrast with previous behavioral studies, we present complex tones which do not blur the melodic component, we present various chord arrangements, and we focus on nonmusicians. Target major chords, in three different harmonic conditions (1, 2, and 4 steps along the circle of fifths between prime and target chords), elicited two centro-anterior negativities labeled N5E (early) and N5L (late) suggesting a dissociation between an earlier psychoacoustic process based on pitch commonality and proximity and a later cognitive process based on a common parent-key. PMID:19404220

Granot, Roni Y; Hai, Atalia

2009-06-17

311

Event-related potentials indicating impaired emotional attention in cerebellar stroke--a case study.  

PubMed

The cerebellum has been implicated in affective and attentional processes, but little is known about corresponding neural signatures. We investigated early and late components of event-related potentials (ERPs) to emotionally arousing pictures, with and without competing attentional tasks, in a patient with an ischemic right posterior cerebellar infarction, at two months post infarct and two year follow-up. The early posterior negativity (EPN) response to highly arousing emotional cues in the competing visual attention condition revealed that the augmentation over occipital areas, as typically seen in normals, was absent post-infarct but was restored after two years. The late positive potentials (LPP) response to highly arousing emotional cues showed augmentation over frontal areas post-infarct, and over centro-parietal regions after two years. These ERP findings suggest a specific pattern of disruption of neural function associated with emotional-behavioral disturbances following cerebellar lesions, which can revert to normal with long term recovery. PMID:23643987

Adamaszek, M; Olbrich, S; Kirkby, K C; Woldag, H; Willert, C; Heinrich, A

2013-08-26

312

Growth and characterization of tetramethyl ammonium tetrachloro zincate II: A ferroic crystal  

NASA Astrophysics Data System (ADS)

Ferroic crystals of tetramethyl ammonium tetrachlorozincate (TMA-ZnCl) were grown by slow evaporation technique and the morphology of the grown crystals varies with different pH values. The compound crystallizes in orthorhombic primitive system at room temperature with non-centro symmetric space group Pmna. The grown crystals were subjected to powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible-near-infrared (UV-vis-NIR) spectral studies and thermal studies. Differential scanning calorimetry (DSC) measurement confirms the existence of structural phase transition and the thermogravimetric analysis (TGA) studies reveals that the crystal is thermally stable up to 330 °C. Vicker's microhardness studies expose that the material is mechanically stable up to a load of 60 g. The laser second harmonic generation (SHG) efficiency of the grown crystal was found to be 1.3 times that of potassium dihydrogen orthophosphate (KDP) crystal.

Devashankar, S.; Mariappan, L.; Sureshkumar, P.; Rathnakumari, M.

2009-08-01

313

[The quality of cancer registry. From a methodology approach].  

PubMed

Since 1996 at the unit of epidemiological research of the "Hospital de Pediatría en Centro Medico Nacional Siglo XXI" a cancer registry in children has been done. This registry has been a pioneer with special features like be only in child population attended in Mexico City. The following paper describes the main characteristics of the registry, the strategy used to obtain the data, the quality criterion applied for selecting data like timeliness, validated and complete. A longitudinal and prolective data was obtained. There was a training period for obtaining and register the data. The data was obtained from children with neoplasm attended at the mentioned hospital above. The diagnosis of a solid neoplasm was established by histology and marrow aspirated studies. The population studied was children (0-14 years). It was calculated the incidence (per 1000 000 children/year) by age, sex, diagnosis and place of residence. The trend was evaluated by estimating the average annual percent of change. PMID:23383474

Fajardo-Gutiérrez, Arturo; González-Miranda, Guadalupe

2011-01-01

314

Environmental conservation by radiation technology: A new Italian multipurpose demonstration centre  

NASA Astrophysics Data System (ADS)

A new italian R&D/ Demonstration Centre, named CE.S.T.I.A. (CEntro Sperimentazione Tecnologie di Irraggiamento per l'Ambiente, namely Experimental Centre for Environmental Applications of Radiation Technology) will be presented. The Centre, that should represent the largest project in the world for research on environmental applications of radiation technology, will be located in the South of Italy and foresees, over an area of 35, 000 m 2, four independent irradiation plants, each one with a dedicated electron beam machine. The foreseen EB-machines features allow a large operative flexibility; the first research cycle will regard five activity lines: hazardous wastes, waste water, flue gases, hospital wastes, clean technologies. The Centre technical and economic features are described, together with an analysis of realistic spreading perspectives of radiation technology on the Italian industrial wastes management market.

Tata, A.; Manni, S.

1993-10-01

315

Exoplanets: light curves with different telescopes  

NASA Astrophysics Data System (ADS)

In this poster contribution we present photometric results of the exoplanet WASP-1b with different filters in the 80 cm IAC80 telescope at the Observatorio del Teide (Canary Islands, Spain), as part of an observation campaign of the Robotic Telescopes Group at Centro de Astrobiologia (CAB) in October 2008. After that, we compare the previous light curves with the ones obtained by our group using the INTA-CAB 50 cm robotic telescope located at Calar Alto Observatory (Almeria, Spain). We indicate the photometric accuracy obtained for each case (2 mmag in the first case and 3 mmag in the second one). Finally, we point out how the studies carried out by our robotic telescope can/must be complemented with the use of other astronomical facilities.

Ullan, A.; Eibe, M. T.; Cuesta, L.; Perez-Verde, A.; Navas, J.

2011-11-01

316

Continuous spikes and waves during slow sleep in a child with karyotype 47, XYY.  

PubMed

The XYY syndrome is a sex chromosome aneuploidy occurring in one of 1,000 live male births. Only few data exist regarding the correlation between this syndrome and epilepsy. An EEG pattern suggestive of benign focal epilepsy with centro-temporal spikes has recently been described in four XYY patients. We report the first patient with XYY trisomy, rolandic spikes, and atypical evolution with continuous spikes and waves during slow sleep (CSWSS). The present report suggests that the association between an EEG pattern similar to that of BECTS and 47, XYY karyotype may not be coincidental. Moreover, we show that an atypical evolution with CSWSS may occur in this chromosomal disorder. PMID:24776967

Cianci, Vittoria; Ferlazzo, Edoardo; De Martino, Giuseppe; Vinci, Angela; Gasparini, Sara; Tripodi, Giovanbattista Gaspare; Aguglia, Umberto

2014-06-01

317

Early works on the nuclear microprobe for microelectronics irradiation tests at the CEICI (Sevilla, Spain)  

NASA Astrophysics Data System (ADS)

Particle radiation effects are a fundamental problem in the use of numerous electronic devices for space applications, which is aggravated with the technology shrinking towards smaller and smaller scales. The suitability of low-energy accelerators for irradiation testing is being considered nowadays. Moreover, the possibility to use a nuclear microprobe, with a lateral resolution of a few microns, allows us to evaluate the behavior under ion irradiation of specific elements in an electronic device. The CEICI is the new CEnter for Integrated Circuits Irradiation tests, created into the facilities at the Centro Nacional de Aceleradores (CNA) in Sevilla-Spain. We have verified that our 3 MV Tandem accelerator, typically used for ion beam characterization of materials, is also a valuable tool to perform irradiation experiments in the low LET (Linear Energy Transfer) region.

Palomo, F. R.; Morilla, Y.; Mogollón, J. M.; García-López, J.; Labrador, J. A.; Aguirre, M. A.

2011-10-01

318

Analysis of cosmic ray variations observed by the CARPET in association with solar flares in 2011-2012  

NASA Astrophysics Data System (ADS)

The CARPET cosmic ray detector was installed on April 2006 at CASLEO (Complejo Astronmico El Leoncito) at the Argentinean Andes (31.8S, 69.3W, 2550 m, Rc=9.65 GV). This instrument was developed within an international cooperation between the Lebedev Physical Institute RAS (LPI; Russia), the Centro de Radio Astronomia e Astrofsica Mackenzie (CRAAM; Brazil) and the Complejo Astronmico el Leoncito (CASLEO; Argentina). In this paper we present results of analysis of cosmic ray variations recorded by the CARPET during increased solar flare activity in 2011-2012. Available solar and interplanetary medium observational data obtained onboard GOES, FERMI, ISS, as well as cosmic ray measurements by ground-based neutron monitor network were also used in the present analysis.

Makhmutov, V.; Raulin, J.-P.; De Mendonca, R. R. S.; Bazilevskaya, G. A.; Correia, E.; Kaufmann, P.; Marun, A.; Fernandez, G.; Echer, E.

2013-02-01

319

A MATLAB-based interface for the beam-transport system of an AMS facility  

NASA Astrophysics Data System (ADS)

In this paper we present a MATLAB code built to model the transport of a charged particle beam through the Accelerator Mass Spectrometry (AMS) facility located at the Centro Nacional de Aceleradores (CNA, Seville, Spain). We determine the beam transport through the optical system using the transfer matrix formalism in two different approaches (ray tracing and the beam-envelope approach) and describe it in terms of cross section size and emittance. The beam size results given by MATLAB are compared with the measured beam size in three of the four image points that the system has, obtaining a good agreement between them. This suggests that the first-order transfer matrix formalism is enough to simulate the optical behavior of the system.

Gómez-Guzmán, J. M.; Gómez-Morilla, I.; Enamorado-Báez, S. M.; Moreno-Suárez, A. I.; Pinto-Gómez, A. R.

2013-12-01

320

Fourth-order coherent Raman microspectroscopy for detection of material symmetry  

NASA Astrophysics Data System (ADS)

Coherent Raman scattering provides chemical imaging by using molecular vibrational information sensitive to molecular structure. To add another information of martial symmetry, we propose using fourth order coherent Raman scattering for imaging, because the even order nonlinear phenomenon is forbidden for centro-symmetric material. We have developed a multiplex fourth order coherent Raman scattering microscopy system using a femtosecond laser. A narrowband beam of 17 cm-1 bandwidth and a broadband beam generated by a photonic crystal fiber enables to obtain a spectrum of fourth order coherent Raman scattering at once. We demonstrate the fourth order coherent Raman, hyper-Raman and second harmonics of trans-4'-(dimethylamino)-N-methyl-4- stilbazolium tosylate crystal by using the developed microscope.

Hashimoto, Mamoru; Kanoh, Hiroto; Niioka, Hirohiko; Araki, Tsutomu

2014-02-01

321

Evaluation of a solar intermittent refrigeration system for ice production operating with ammonia/lithium nitrate  

SciTech Connect

A novel solar intermittent refrigeration system for ice production developed in the Centro de Investigacion en Energia of the Universidad Nacional Autonoma de Mexico is presented. The system operates with the ammonia/lithium nitrate mixture. The system developed has a nominal capacity of 8 kg of ice/day. It consists of a cylindrical parabolic collector acting as generator-absorber. Evaporator temperatures as low as -11 C were obtained for several hours with solar coefficients of performance up to 0.08. It was found that the coefficient of performance increases with the increment of solar radiation and the solution concentration. A dependency of the coefficient of performance was not founded against the cooling water temperature. Also it was found that the maximum operating pressure increases meanwhile the generation temperature decreases with an increase of the solution concentration. (author)

Rivera, W.; Moreno-Quintanar, G.; Best, R. [Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A.P. 34, 62580 Temixco, Mor. (Mexico); Rivera, C.O.; Martinez, F. [Facultad de Ingenieria Campus Coatzacoalcos, Universidad Veracruzana, Av. Universidad Km 7.5, 96530 Coatzacoalcos, Ver. (Mexico)

2011-01-15

322

Influence of drying treatments on antioxidant capacity of forage legume leaves.  

PubMed

This study was aimed to investigate the antioxidant capacities of four common forage legume leaves namely, Arachis pintoi (Pintoi), Calapogonium mucunoides (Calapo), Centrosema pubescens (Centro), and Stylosanthes guanensis (Stylo). Two different drying methods (oven-drying and freeze-drying) were employed and antioxidant activities were determined by DPPH, Ferric Reducing Antioxidant Power (FRAP) and ?-carotene bleaching assays. Total phenolic content (TPC) was determined using Folin-Ciocalteu assay. Freeze-dried extract showed the highest antioxidant activities by DPPH (EC50 values 1.17-2.13 mg/ml), FRAP (147.08-246.42 ?M of Fe(2+)/g), and ?-carotene bleaching (57.11-78.60%) compared to oven drying. Hence, freeze drying treatment could be considered useful in retention of antioxidant activity and phenolic content. PMID:24803709

Sang, Saw Yei; Jamharee, Fazrina; Prasad, K Nagendra; Azlan, Azrina; Maliki, Nurzillah

2014-05-01

323

Traffic and catalytic converter - related atmospheric contamination in the metropolitan region of the city of Rio de Janeiro, Brazil.  

PubMed

In this work, 24-h PM10 samples were collected in Rio de Janeiro, Brazil, and analysed for trace elements (Cd, Ce, Cu, La, Mo, Ni, Pb, Pd, Rh, Sb and Sn). The sampling was carried out at five locations (Bonsucesso; Centro, downtown city; Copacabana; Nova Iguaçu and Sumaré) with different traffic densities and anthropogenic activities. An analytical method based on the EPA method for the determination of trace elements in airborne particulate matter (PM), using ultrasonic-assisted extraction and inductively coupled plasma mass spectrometry (ICP-MS) was applied. Our results suggest that vehicular traffic is the most important source of environmental pollution at the studied sites. The presence of Mo, Pd and Rh in the analysed filters reflects an additional source of pollution caused by the erosion and deterioration of automotive catalytic converters. PMID:18082244

da Silva, Lílian Irene Dias; de Souza Sarkis, Jorge Eduardo; Zotin, Fátima Maria Zanon; Carneiro, Manuel Castro; Neto, Arnaldo Alcover; da Silva, Alzira dos Santos Amaral Gomes; Cardoso, Mauri José Baldini; Monteiro, Maria Inês Couto

2008-03-01

324

First tests of the ion irradiation and implantation beamline at the CMAM  

NASA Astrophysics Data System (ADS)

The implantation and irradiation beamline of the Tandem ion accelerator of the Centro de Micro Análisis de Materiales (CMAM), in Madrid, has been recently completed with a beam sweep and monitoring system, and a cryostat/furnace. These new implementations convert the beamline into a versatile tool to implant ions, between H and Au2, in different materials with precise control of the sample temperature, which may be varied between -180 °C and 600 °C. The size of the swept area on target may be as large as 10 × 10 cm2. The implantation chamber also allows carrying out in situ or/and on line analyses during the irradiations by means of advanced optical measurements, as well as ion beam analyses (IBA). These advancements can be employed in novel applications such as the fabrication of optical waveguides and irradiation tests of structural and functional materials for future fusion reactors. The results of beam tests and first experiments are shown.

Jiménez-Rey, D.; Benedicto, M.; Muñoz-Martín, A.; Bachiller-Perea, D.; Olivares, J.; Climent-Font, A.; Gómez-Ferrer, B.; Rodríguez, A.; Narros, J.; Maira, A.; Álvarez, J.; Nakbi, A.; Zucchiatti, A.; de Aragón, F.; García, J. M.; Vila, R.

2014-07-01

325

Magnetoelectric interactions and phase transitions in a new class of multiferroics with improper electric polarization  

NASA Astrophysics Data System (ADS)

Symmetry analysis of magnetoelectric interactions in rare-earth orthoferrites and orthochromites has been performed. It has been shown that symmetry allows the appearance of spontaneous electric polarization or the magnetic-field-induced polarization in the region of antiferromagnetic (centro-asymmetric) ordering of the rare-earth ions. The analysis reveals a number of pronounced anomalies in the behavior of the electric polarization at the metamagnetic and spin-reorientation transitions in DyCrO3 and TbFeO3. This behavior points to a strong sensitivity of the magnetoelectric properties of such magnets to the antiferromagnetic state of the rareearth subsystem and the spin orientation of the d ions.

Zvezdin, A. K.; Mukhin, A. A.

2008-12-01

326

Statistical Analysis of Sleep Spindle Occurrences  

PubMed Central

Spindles - a hallmark of stage II sleep - are a transient oscillatory phenomenon in the EEG believed to reflect thalamocortical activity contributing to unresponsiveness during sleep. Currently spindles are often classified into two classes: fast spindles, with a frequency of around 14 Hz, occurring in the centro-parietal region; and slow spindles, with a frequency of around 12 Hz, prevalent in the frontal region. Here we aim to establish whether the spindle generation process also exhibits spatial heterogeneity. Electroencephalographic recordings from 20 subjects were automatically scanned to detect spindles and the time occurrences of spindles were used for statistical analysis. Gamma distribution parameters were fit to each inter-spindle interval distribution, and a modified Wald-Wolfowitz lag-1 correlation test was applied. Results indicate that not all spindles are generated by the same statistical process, but this dissociation is not spindle-type specific. Although this dissociation is not topographically specific, a single generator for all spindle types appears unlikely.

Panas, Dagmara; Malinowska, Urszula; Piotrowski, Tadeusz; Zygierewicz, Jaroslaw; Suffczynski, Piotr

2013-01-01

327

Extreme Energy Events Project: Construction of the detectors and installation in Italian High Schools  

NASA Astrophysics Data System (ADS)

The EEE Project, conceived by its leader Antonino Zichichi, aims to detect Extreme Energy Events of cosmic rays with an array of muon telescopes distributed over the Italian territory. The Project involves Italian High Schools in order to introduce young people to Physics, also countervailing the recent crisis of university scientific classes inscriptions. The detectors for the EEE telescopes are Multigap Resistive Plate Chambers (MRPC) and have been constructed by teams of High School students who went in shift at the CERN laboratories. The mechanics and the electronics were developed by groups of researchers from CERN, the Italian Centro Fermi and INFN. The first group of schools of the EEE Project has inaugurated their telescopes recently. A status report of the Project and the preliminary results are presented.

Abbrescia, M.; An, S.; Antolini, R.; Badalà, A.; Baldini Ferroli, R.; Bencivenni, G.; Blanco, F.; Bressan, E.; Chiavassa, A.; Chiri, C.; Cifarelli, L.; Cindolo, F.; Coccia, E.; de Pasquale, S.; di Giovanni, A.; D'Incecco, M.; Fabbri, F. L.; Frolov, V.; Garbini, M.; Gustavino, C.; Hatzifotiadou, D.; Imponente, G.; Kim, J.; La Rocca, P.; Librizzi, F.; Maggiora, A.; Menghetti, H.; Miozzi, S.; Moro, R.; Panareo, M.; Pappalardo, G. S.; Piragino, G.; Riggi, F.; Romano, F.; Sartorelli, G.; Sbarra, C.; Selvi, M.; Serci, S.; Williams, C.; Zichichi, A.; Zuyeuski, R.

2008-04-01

328

A revised configuration of the southern California uplift  

USGS Publications Warehouse

Recently recovered archival levelling data from southwestern Arizona and adjacent parts of California compel major revisions in the configuration and interpretation of the southern California uplift, both at its culmination and following its partial collapse. Re-examination of the older vertical-control record indicates that similar modifications may be equally appropriate in any reconsideration of the early-20th-century analogue of the southern California uplift. The chief changes in our earlier reconstructions appear as a sharply diminished isobase gradient south of Cottonwood Pass, dramatically reduced tectonic subsidence centering on the Salton Sea, and short-lived uplift of of at least 0.3 m at the latitude of El Centro. A newly refined qualitative interpretation of the data implies contraction and decoupling at the base of the seismogenic zone, in conjunction with right-stepping movement and extension between an en echelon transform pair through the Salton Basin. -from Authors

Castle, R. O.; Gilmore, T. D.

1992-01-01

329

Astronomía en la cultura  

NASA Astrophysics Data System (ADS)

La Astronomía en la Cultura es el estudio interdisciplinario a nivel global de la astronomía prehistórica, antigua y tradicional, en el marco de su contexto cultural. Esta disciplina abarca cualquier tipo de estudios o líneas de investigación en que se relacione a la astronomía con las ciencias humanas o sociales. En ella se incluyen tanto fuentes escritas, relatos orales como fuentes arqueológicas, abarcando entre otros, los siguientes temas: calendarios, observación práctica, cultos y mitos, representación simbólica de eventos, conceptos y objetos astronómicos, orientación astronómica de tumbas, templos, santuarios y centros urbanos, cosmología tradicional y la aplicación ceremonial de tradiciones astronómicas, la propia historia de la astronomía y la etnoastronomía (Krupp, 1989) (Iwaniszewski, 1994). En nuestro trabajo abordamos la historia y situación actual de esta disciplina, sus métodos y sus relaciones con otras áreas de investigación.

López, A.; Giménez Benitez, S.; Fernández, L.

330

Growth, Structural And Optical Studies On Bis L-alanine Lithium Chloride (BLALC) Single Crystal  

NASA Astrophysics Data System (ADS)

Bis L-alanine Lithium Chloride (BLALC) single crystals were grown successfully by solution method with slow evaporation technique at room temperature. Crystals of size 15 x 9 x 4 mm3 have been obtained in 28 days. The grown crystals were colourless and transparent. Single crystal X-ray diffraction (XRD) study showed that BLALC belongs to orthorhombic system with a non-centro-symmetric space group P212121. The crystallinity of BLALC crystal was confirmed by the powder X-ray diffraction study and diffraction peaks were indexed. The functional groups of the grown crystals have been identified by FTIR studies. UV-visible transmittance spectrum was recorded to study the optical transparency of BLALC crystal. The nonlinear optical (NLO) property of the grown crystal was confirmed by Kurtz-Perry powder technique.

Rose, A. S. J. Lucia; Selvarajan, P.; Perumal, S.

2011-10-01

331

REVERSING CYCLIC ELASTO-PLASTIC DEMANDS ON STRUCTURES DURING STRONG MOTION EARTHQUAKE EXCITATION.  

USGS Publications Warehouse

Using the horizontal components from El Centro 1940, Taft 1952, and 4 accelerograms from the San Fernando earthquake of 2/9/71, the time history of the elasto-plastic displacement response was calculated for oscillators having periods within the range of 1 to 6 s and ductility factors within the range of 3 to 6. The Nth largest peak of the elasto-plastic response (N equals 2,4,8,16), when expressed as a percentage of maximum response (that is, N equals 1), is fairly independent of period within our period range. When considering only plastic peaks occurring, sometimes in a one-directional group of peaks, in the reverse direction from the preceding plastic peak, the amplitude of the Nth reversing plastic peak is similar to the Nth elastic peak, regardless of the ductility factor.

Perez, V.; Brady, A. G.; Safak, E.

1986-01-01

332

Excitation energy transport in fractal aggregates  

NASA Astrophysics Data System (ADS)

A theory is developed to describe excitation energy transport in fractal aggregates. These fractal structures have densities which scale as a fractional power of the radius. Because of this, each donor is in a different environment with respect to donor and/or trap density. Consequently, ensemble averages cannot be performed using centro-symmetric coordinates. This problem has great similarities to the case of excitation energy transport in finite volumes. In this work the theory developed by Ediger and Fayer for the finite volume case is adapted to the fractal case. Förster limit (donor-trap transfer) and one-component (donor-donor transfer) systems are considered. Specific examples of Förster transfer are treated for the infinite size fractal, two-dimensional fractals and transfer from the aggregate to the excluded volume. A simple formalism for deriving expressions for the mean relaxation time of excitation is presented.

Dewey, T. Gregory

1991-02-01

333

Astronomía Gamma desde El Leoncito  

NASA Astrophysics Data System (ADS)

La astronomía gamma, en el extremo de energías detectadas hasta el presente, se encuentra en desarrollo en muchas partes del mundo y proporciona resultados sorprendentes a medida que la tecnología avanza en el desarrollo de nuevos detectores. La técnica Cherenkov Atmosférica es la utilizada para la detección, mediante telescopios en tierra, del efecto secundario causado por la radiación gamma de muy altas energías (E ? TeV). Por medio de telescopios o arreglos de detectores y utilizando la técnica mencionada, se han podido detectar algunas fuentes puntuales de mucha importancia astrofísica como la Nebulosa del Cangrejo y la galaxia de núcleo activo Markarian 421. El sistema instalado en San Juan, en cooperación con el grupo de Radiación Gamma del Observatorio Whipple, está constituído por tres colectores de 1.5m que registran pulsos de luz generados por las cascadas de partículas producidas por rayos cósmicos de todo tipo al entrar en la atmósfera terrestre. El sistema opera por barrido en ascención recta de la fuente observada que, para esta etapa del experimento, es el Centro Galáctico. Esta fuente extensa es conocida como emisor gamma de energías inferiores al TeV y ha sido observada anteriormente en este rango de energía desde el hemisferio norte pero con elevaciones bajas, situación no óptima para este tipo de técnica. Se presentan los primeros resultados del análisis de los datos obtenidos observando la región del Centro Galáctico, luego de dos años de observaciones, así como una descripción de la técnica Cherenkov Atmosférica y del equipo utilizado en la experiencia.

Rovero, A. C.; Colombo, E.; Sahade, J.; Weekes, T. C.

334

Children with low motor ability have lower visual-motor integration ability but unaffected perceptual skills.  

PubMed

The purpose of this study was to examine perceptual, visual-motor abilities and intellectual skills in children with low, average and above average motor abilities. The participants were 144 children (aged 6-10 years) attending elementary school. Three groups of children were identified on the basis of their performance at the TGMD (Test of Gross Motor Development; [Ulrich, D.A. (1985). TGMD, Test of Gross Motor Development. Austin, Texas: PRO-ED. Edizione Italiana a cura di D. Ianes, TEST TGM. Test di valutazione delle abilita grosso-motorie. 1994, Trento: Edizioni Centro Studi Erickson]). Each child received an intelligence test (K-BIT; [Kaufman, A.S., & Kaufman, N.L. (1990). K-BIT. Kaufman Brief Intelligence Test. Circle Pines, MN: American Guidance Service]) and was evaluated for perceptual and visual-motor integration abilities (DTVP; [Hammill, D.D., Pearson, N.A., & Voress, J.K. (1993). Developmental Test of Visual Perception (2nd ed.). Austin, Texas: PRO-ED. Edizione Italiana a cura di D. Ianes, TEST TPV. Test di percezione visiva e integrazione visuo-motoria. Trento: Edizioni Centro Studi Erickson]). Results highlight a significant difference in visual-motor integration between children with high and low gross-motor abilities, in the absence of significant differences in perceptual skills or intellectual ability. The findings are discussed with reference to the concept of atypical brain development [Gilger, J.W., & Kaplan, B.J. (2001). Atypical brain development: A conceptual framework for understanding developmental learning disabilities. Developmental Neuropsychology, 20, 465]. PMID:15474175

Bonifacci, Paola

2004-09-01

335

Physics of the multi-functionality of lanthanum ferrite ceramics  

NASA Astrophysics Data System (ADS)

In the present work, we have illustrated the physics of the multifunctional characteristics of nano-crystalline LaFeO3 powder prepared using auto-combustion synthesis. The synthesized powders were phase pure and crystallized into centro-symmetric Pnma space group. The temperature dependence of dielectric constant of pure LaFeO3 exhibits dielectric maxima similar to that observed in ferroelectric ceramics with non-centrosymmetric point group. The dielectric relaxation of LaFeO3 correlates well with small polaron conduction. The occurrence of polarization hysteresis in LaFeO3 (with centro-symmetric Pnma space group) is thought to be spin current induced type. The canting of the Fe3+ spins induce weak ferromagnetism in nano-crystalline LaFeO3. Room temperature saturation magnetization of pure LaFeO3 is reported to be 3.0 emu/g. Due to the presence of both ferromagnetic as well as polarization ordering, LaFeO3 behaves like a single phase multiferroic ceramics. The magneto-electric coupling in this system has been demonstrated through the magneto-dielectric measurements which yield about 0.8% dielectric tuning (at 10 kHz) with the application of 2 T magnetic field. As a typical application of the synthesized nano-crystalline LaFeO3 powder, we have studied its butane sensing characteristics. The efficient butane sensing characteristics have been correlated to their catalytic activity towards oxidation of butane. Through X-ray photoelectron spectroscopy analyses, we detect the surface adsorbed oxygen species on LaFeO3 surface. Surface adsorbed oxygen species play major role in their low temperature butane sensing. Finally, we have hypothesized that the desorbed H2O and O2 (originate from surface adsorbed hydroxyl and oxygen) initiate the catalytic oxidative dehydrogenation of n-butane resulting in weakening of the electrostatics of the gas molecules.

Bhargav, K. K.; Ram, S.; Majumder, S. B.

2014-05-01

336

Are low and high number magnitudes processed differently while resolving the conflict evoked by the SNARC effect?  

PubMed

In the brain, numbers are thought to be represented in a spatially organised fashion on what is known as the Mental Number Line (MNL). The SNARC (Spatial-Numerical Association of Response Codes) effect refers to the faster responses to digits when the reaction side is congruent with the digit position on the MNL (e.g. a left-handed response to a small magnitude) and the slowing down of responses (inhibition) in the case of incongruity. We examined the electrophysiological correlates of conflict, which are linked to that of inhibition, to shed light on the relationship between the SNARC effect and executive attention. Event-related potentials (ERPs) were recorded from twenty-nine participants during a parity-judgment task. The participants responded more quickly on congruent than on incongruent trials. The congruency effect was reflected in early sensory (N1, N2) components above parieto-occipital and frontal regions, as well as in the later P3 component above centro-parietal areas. Moreover, both the N1 amplitude and N2 latency were greater with high than low magnitude digit targets. P3 amplitude modulation implies that the SNARC effect is the result of first evoking the parallel processing of digit magnitude categorisation (in the occipital and central areas) and numeric conflict detection (in the parieto-occipital and frontal areas) and secondly conflict monitoring and resolution localised in the centro-parietal and frontal sites. These results also suggest that the left hemisphere specialises in conflict processing of high magnitude digit targets, while the right hemisphere of low digit magnitudes. PMID:22343113

Gut, Ma?gorzata; Szumska, Izabela; Wasilewska, Marzena; Ja?kowski, Piotr

2012-07-01

337

PREFACE: Second School on Cosmic Rays and Astrophysics  

NASA Astrophysics Data System (ADS)

The physics of cosmic rays, gamma rays and neutrinos has become nowadays a subject of fast development. On the other hand present and planed experimental facilities installed in the American continent, attract and facilitate the involvement of local young researchers. For these reasons Professor Oscar Saavedra and his team of the high altitude cosmic ray Chacaltaya laboratory and the Universidad Mayor de San Andres in La Paz Bolivia, conceived the idea of organizing the First School on Cosmic Rays and Astrophysics in La Paz 9-20 August 2004. That school was possible, in spite of the scarcity of funds, thanks to the solidary participation of several distinguish lecturers who paid their travel and local expenses. Their lectures were made available on a CD by the local students. It was then decided that a second school be organized for 2006 in Mexico. It was held from 28 August to 15 September 15. Some of the lecturers in this Second School on Cosmic Rays and Astrophysics were too busy to write their lectures, but here we put at the disposal of the interested community the contributions of Roberto Battiston, Karen S Caballero, Edgar Casimiro, David Delepine, Giorgio Giacomelli, Gonzalo Rodríguez and Luis Villaseñor. This School was possible thanks to the financial assistance of CONACyT (Mexico), the Benemerita Universidad Autonoma de Puebla, Centro de Investigacion y de Estudios Avanzados (Cinvestav), the University of Torino and the Centro Latino Americano de Fisica. Arnulfo Zepeda The editors of these proceedings are: Rebeca López Rodrigo Pelayo Oscar Saavedra Arnulfo Zepeda

Zepeda, Arnulfo

2008-02-01

338

Enhancing Diversity In The Geosciences; Intensive Field Experience In USA And Mexico For Middle And High School Teachers Serving Large Hispanic Populations.  

NASA Astrophysics Data System (ADS)

To encourage Hispanic participation and enrolment in the geosciences and ultimately enhance diversity within the discipline, we recruited ten middle and high school science teachers serving large Hispanic populations (60-97%) for a paid three-week field experience supported by an NSF Opportunities for Enhancing Diversity in the Geosciences grant. In 2006, the field experiences focused on volcanic events and the water problems of the Central part of Mexico. In 2008, the field experiences focused on karstic and hydrogeological conditions of the Yucatan Peninsula. In addition to the geological aspects of the fieldwork experience, the trip to Mexico exposed the teachers to a social environment outside of their community where they interacted with a diverse group of scientists from the Universidad National Autonoma de Mexico (UNAM), Centro de Investigacion Cientifica de Yucatan (CICY) and Centro Nacional de Desastres (CENAPRED). A key part of this project was the encounter between American and Mexican teachers that included a day of presentations, panel discussion and some class-room activities. Direct interaction between the cooperating teachers and the American and Mexican geoscientists provided actual scientific research experiences to educate and to help dispel misconceptions the teachers themselves may have had about who geoscientists really are and what they do. Teachers of the 2006 group produced educational materials from their field experiences and presented these materials at professional conferences. We measured the efficacy of these activities quantitatively via pre- and post-tests assessing confidence levels, preconceptions and biases, NIU staff observations of participants in their home institutions, and evaluations of participants' field books and pedagogical materials. We present these data here and identify specific activities that are both effective and efficient in changing teacher behaviours and attitudes enabling them to better connect with their Hispanic students in their Geoscience classrooms. Post experience activities of the 2008 group will build on these results.

Leal-Bautista, R. M.; Kitts, K. B.; Velazquez Oliman, G.; Perry, E. C.

2008-12-01

339

Simulation of polarization maps. 1: Protostellar envelopes  

NASA Astrophysics Data System (ADS)

We developed a Monte Carlo code for the computation of polarization maps. This code includes multiple scattering and allows the computation for arbitrary dust configurations. In our model, we consider both the radiation of the central energy source and the thermal emission of the circumstellar dust. As one of the first applications of our code, we present polarization maps for 2D hydrodynamical models (for two time steps of evolution: 32010 and 86222 yr) of a 1 solar mass rotating molecular clump which evolved into a protostar surrounded by a disk and envelope. For deriving the polarization patterns, we used two populations of the DL-MRN model - the diffuse Interstellar matter (ISM)-population (radii between 0.005 and 0.25 micrometers) and a population with only larger grains (radii between 0.1 and 1 micrometers). We calculated the polarization maps for 11 wavelength bands between 0.55 micrometers (V) and 1.3 mm. The computed maps agree with the typical features of the observed polarization maps of circumstellar regions around young stellar objects (YSOs). The grains in the optically thin lobes scatter the light only once. Therefore, the radiation from these lobes is strongly polarized and has a centro-symmetric polarization pattern. For the inner regions of the dust disk which are optically thick, the polarization vectors are aligned and parallel to the disk plane. In the optically thin outer disk regions, the pattern is centro-symmetric again. The computed maps give evidence that the particles are larger than assumed in the standard MRN model.

Fischer, O.; Henning, Th.; Yorke, H. W.

1994-04-01

340

 

PubMed

Las profesiones de la salud tienen un papel social dual. Por un lado, velan por el mantenimiento de la salud de la población protegiendo el bien común. Por el otro, dictaminan las formas saludables, y por lo tanto socialmente apropiadas, de ser, actuar y pensar. Este último papel, está más ligado al control social de la población que a una preocupación altruista hacia la misma. A través de esta supervisión y control, se construyen los sujetos a los cuales todos/as debemos aspirar a ser para gozar de aceptación social. Los/as profesionales de la salud han jugado un rol protagónico en dicho proceso, siendo los agentes que delimitan y definen lo que es enfermo vs. saludable, útil vs. inútil, apropiado vs. inapropiado. En el caso de la epidemia del VIH, este esfuerzo se ha hecho cada vez más vigente ya que estos/as profesionales juegan un papel importante en el tratamiento de las personas que viven con VIH/SIDA (PVVS). Sin embargo, su función está plasmada de definiciones que sirven para criminalizar a las PVVS. El objetivo de este estudio fue explorar la manera en que una muestra de profesionales de la salud en Puerto Rico construyen a las PVVS. Con este propósito, entrevistamos 80 profesionales de la salud y estudiantes de estas profesiones. Estas entrevistas fueron grabadas, transcritas y sometidas a un análisis de discurso. Los resultados reflejaron que según las personas participantes: 1) la PVVS no es una persona "normal" o funcional bajo los estándares sociales debido a que su salud no se los permite, 2) representa una carga para la sociedad incluyendo familiares, amigos/as, el mundo del trabajo, e incluso para el gobierno, 3) debe ser vigilada porque representa un riesgo para la persona seronegativa que es descrita como saludable y productiva, y 4) necesita que su salud y conducta sexual sean controladas por vía legal y/o por las personas que representan las instituciones sociales, como lo son los/as profesionales de la salud. En este artículo abordamos el potencial rol de la psicología para servir como vehículo de reconstrucción de dichas nociones, tomando en consideración su propio rol en la formación y mantenimiento de dicho sujeto socialmente deseable. PMID:22025907

Rivera, Souhail Malavé; Díaz, Nelson Varas

2006-01-01

341

The distant activity of Short Period Comets - II.  

NASA Astrophysics Data System (ADS)

The activity of the Short Period Comets (SPCs) at large heliocentric distance (Rh > 3 au) occurs in a region of the Solar system where the water sublimation rate is low and so the sublimation of other volatiles, for example CO or CO2, could drive the presence of a coma. The detection of distant activity in a SPC can therefore give important hints on its composition. Moreover, a complete characterization of the distant SPCs degree of activity is crucial in order to give correct estimates of the nucleus size and to obtain more reliable size-distribution curves of cometary nuclei. The aim of this paper is to present the last results of a program of CCD imaging of distant SPCs, started in 2004 December and concluded with observing runs at the 3.5-m Telescopio Nazionale Galileo at La Palma, in 2005 April, and at the 2.2-m Centro Astronómico Hispano Alemán (CAHA) telescope in Spain, in 2005 May. During the Spring 2005 campaign, 12 SPCs have been targeted in the R band (eight numbered SPCs and four still unnumbered SPCs): 61P/Schajn-Schaldach, 71P/Clark, 98P/Takamizawa, 103P/Hartley 2, 117P/Helin-Roman-Alu 1, 118P/Shoemaker-Levy 4, 121P/Shoemaker-Holt 2, 136P/Mueller 3, P/2002 T5 (LINEAR), P/2003 S1 (NEAT), P/2003 S2 (NEAT), P/2004 DO29 (Spacewatch-LINEAR). The heliocentric distance of the targets was 3.05 <= Rh <= 5.30 au. Several levels of activity were detected in the sample, from stellar appearance to well-developed coma and tail. In some cases, the occurrence of cometary activity could be enhanced only with deep visible imaging (e.g. with very long exposure time). For comets with stellar appearance, it was possible to derive a value or a range for the nucleus radius rnucleus (assuming a `classical' albedo value of 0.04): 98P (rnucleus = 0.43 +/- 0.10 km), 136P (rnucleus = 1.2 +/- 0.2 km), P/2003 S2 (rnucleus = 0.81 to 1.55 km). For the active comets, we measured dust production levels in terms of Af? quantity, which was 9.9 <= Af? <= 671 cm. Ensemble properties of the whole sample of the long-term program (a total of 17 SPCs) have been analysed in terms of the relationship among distant activity and dynamical evolution of the targets (in particular, an inward `jump' of the perihelion distance): we can conclude that, even if there is some theoretical indication that this could occur, the hypothesis of distant activity triggered by a rise in perihelion temperature cannot be univocally invoked for these comets. Based on observations collected at the Italian Telescopio Nazionale Galileo (TNG), operated on the island of La Palma by the Centro Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, and at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck Institute für Astronomie and the Instituto de Astrofísica de Andalucia (CSIC). E-mail: epifani@oacn.inaf.it

Mazzotta Epifani, E.; Palumbo, P.; Capria, M. T.; Cremonese, G.; Fulle, M.; Colangeli, L.

2008-10-01

342

Low-Frequency Repetitive Transcranial Magnetic Stimulation (rTMS) Affects Event-Related Potential Measures of Novelty Processing in Autism  

PubMed Central

In our previous study on individuals with autism spectrum disorder (ASD) (Sokhadze et al., Appl Psychophysiol Biofeedback 34:37–51, 2009a) we reported abnormalities in the attention-orienting frontal event-related potentials (ERP) and the sustained-attention centro-parietal ERPs in a visual oddball experiment. These results suggest that individuals with autism over-process information needed for the successful differentiation of target and novel stimuli. In the present study we examine the effects of low-frequency, repetitive Transcranial Magnetic Stimulation (rTMS) on novelty processing as well as behavior and social functioning in 13 individuals with ASD. Our hypothesis was that low-frequency rTMS application to dorsolateral prefrontal cortex (DLFPC) would result in an alteration of the cortical excitatory/inhibitory balance through the activation of inhibitory GABAergic double bouquet interneurons. We expected to find post-TMS differences in amplitude and latency of early and late ERP components. The results of our current study validate the use of low-frequency rTMS as a modulatory tool that altered the disrupted ratio of cortical excitation to inhibition in autism. After rTMS the parieto-occipital P50 amplitude decreased to novel distracters but not to targets; also the amplitude and latency to targets increased for the frontal P50 while decreasing to non-target stimuli. Low-frequency rTMS minimized early cortical responses to irrelevant stimuli and increased responses to relevant stimuli. Improved selectivity in early cortical responses lead to better stimulus differentiation at later-stage responses as was made evident by our P3b and P3a component findings. These results indicate a significant change in early, middle-latency and late ERP components at the frontal, centro-parietal, and parieto-occipital regions of interest in response to target and distracter stimuli as a result of rTMS treatment. Overall, our preliminary results show that rTMS may prove to be an important research tool or treatment modality in addressing the stimulus hypersensitivity characteristic of autism spectrum disorders.

Baruth, Joshua; Tasman, Allan; Mansoor, Mehreen; Ramaswamy, Rajesh; Sears, Lonnie; Mathai, Grace; El-Baz, Ayman; Casanova, Manuel F.

2009-01-01

343

Surface Waves Recorded by Downhole Arrays  

NASA Astrophysics Data System (ADS)

Downhole, or subsurface geotechnical arrays have been installed at La Cienega in Los Angeles, near the Vincent Thomas Bridge in Long Beach, and at Meloland near El Centro as well as at several other locations. More than 25 low amplitude recordings of a few percent g have been recorded at the La Cienega, El Centro and Long Beach arrays, from earthquakes with magnitudes ranging from 2.4 to 7.1. Data from the M7.1 Hector Mine earthquake recorded at these arrays, at epicentral distances of 200-220 km, deserve special attention. The acceleration (short period motion) at the surface is amplified up to 3 times relative to the motion at depth, but the velocity and displacement show practically no near-surface site amplification. Displacements with relatively large amplitudes (up to 10 cm) were recorded at long-periods (up to 8 sec). These large motions are associated with surface waves which have long duration, more than 40 seconds, and are generated in the deep sedimentary basins. Use of downhole array data provides an opportunity to identify Rayleigh waves at the La Cienega and Long Beach Vincent Thomas Bridge arrays. Particle motion variations of ground displacement at different depths are studied in time windows from the beginning to the end of the records. Various windows of the radial component of ground displacement show clear Rayleigh wave type particle motion. In the case of La Cienega array retrograde rotation is observed at the ground surface and at depths of 18 m and 100 m, which shifts to prograde rotation at depth of 252 m. Similarly, in the case of the Vincent Thomas Bridge array in Long Beach, Rayleigh wave particle motion with certain predominant period are identifiable. The phase and group velocity of these short period Rayleigh waves are discussed. The observed response of deep sedimentary sites to distant large earthquakes clearly demonstrates the necessity of taking surface waves into consideration. These long-period waves with long duration are important for certain structures. Since the rate of amplitude decay with distance for these surface waves is less than that for body waves, strong-motion attenuation relationships may benefit from including the consideration of surface wave amplitudes separately. This is particularly important for sites distant from earthquakes and overlying deep sedimentary basins.

Shakal, A.; Graizer, V.; Haddadi, H.; Hipley, P.

2001-12-01

344

METEONETWORK: 2002-2012, 10 years of activities  

NASA Astrophysics Data System (ADS)

The role of citizen-scientists in collecting data and observations has been increasingly crucial in the last 10 years of atmospheric sciences. Meteonetwork is a non-profit organization founded by citizen scientists in 2002, in Lombardia, with the aim of raising public awareness about meteorological and climatological issues. Throughout the years the organization, besides the continuous holding of events such as meeting, conferences and talks, has been standing out because of its forum and its wide network of weather stations. Meteonetwork's forum is, in this field, the most read and followed in the country and with its 8459 members and over 4,217,505 posts turns out to be the 17th forum over the entire country. Its network is operated in cooperation with Centro Epson Meteo and collects amateur semi-professional stations distributed all over the Italian territory, providing real-time and daily data. It consists of 706 stations, among which more than 400 regularly updated; volunteers constantly work to perform quality control and ensure data reliability. Meteonetwork has also developed several collaborations with private and public institutions, among which DRIHM - Cima Research Foundation, Centro Epson Meteo di Milano, Arpa Veneto, Arpa Emilia-Romagna, Arpa Lombardia, Arpa Friuli - Venezia Giulia, Servizio Glaciologico Lombardo, C. N. R. - C. I. S. A, Università di Pisa, Università di Milano, University of Aberdeen, Protezione Civile - Regione Lombardia, Protezione Civile - Regione Piemonte stand out. As WMO emphasized in 2001 World Meteorological Day "Volunteers for the weather, climate and water" the contribution of citizen-scientists to scientific studies is remarkable. In this perspective Meteonetwork and the University of Milan, in April 2011, started a project of technical and scientific cooperation called Weatherness. The university is provided with data gathered by Meteoneonetwork's stations with the aim of improving the knowledge of the impact that heat waves and cold advections have on human health. Following the encouraging results of the "Weatherness" project the organization decided to invest even greater resources into such cooperations and during the summer 2012 started a fruitful collaboration with the DRIHM project. The data collected by its network of weather stations will be transferred to the DRIHM platform where will be used in the context of hydro-meteorological research. High-end model simulations will be performed with the aim of investigating the dynamics involved in hydro-meteorology. Several different projects are still underway but the results obtained in these 10 years of hard work encourage us to pursue our activity and look for new challenges and opportunities.

Mazza, Edoardo

2013-04-01

345

First Steps Towards the Paleoseismological History of the Pastores and Venta de Bravo Faults, Acambay Graben, Trans-Mexican Volcanic Belt, Central Mexico  

NASA Astrophysics Data System (ADS)

The Acambay graben is part of the Trans-Mexican Volcanic Belt (TMVB) which strikes ESE-WNW across central Mexico. The belt is an active, calc-alkaline volcanic arc that is related to the subduction of the Rivera and Cocos plates underneath the North American plate (e.g. Suter et al. 1995). The TMVB comprises a series of intra-arc basins that form the Chapala-Tula fault zone (450 km long, 50 km wide, Suter et al. 1995). The Acambay graben is c. 80 km long, 15 to 35 km wide and limited by four large E-W striking normal faults that are from west to east, the Epitacio-Huerta (EHF) and the Acambay-Tixmadejé faults (ATF) in the north and the Venta de Bravo (VBF) and the Pastores faults (PF) in the south. In the region, there is a low current seismicity but two known historic earthquakes occurred in the graben, the November 19, 1912, ms = 7.0 Acambay event and the February 22, 1979, ms = 4.9 Maravatío earthquake (Astíz-Delgado 1980). The paleoseismic history of the ATF has been previously studied by Langridge et al. (2000). Our focus lies on the paleoseismicity of the southern faults. The rupture history is assessed by tectonic geomorphology and paleoseismic trenches. To study the recent paleoseismic history of the two southern faults, we excavated two trenches on the PF. These trenches lie on young alluvial fans protruding from the Pastores fault scarp. Their location was chosen because of ' steps'\\ in the surface of the alluvial fan that might indicate the position of the most recent fault scarps, in combination with georadar profiles that confirmed vertical displacements in reflectors underneath those steps. The strata in the trenches consist of lake sediments at the base of one trench overlain by interbedded volcanic pyroclastic flows and ash falls which are found in both trenches. In both trenches we found evidence for one paleoearthquake respectively. We are in the process of dating these events by means abundant charcoal which we found in the pyroclastic deposits. Hence, we are confident that we have at least located one fault strand of the main Pastores fault. The discrete fault planes in the trenches offset all but the uppermost layers in the trenches. The displacements we observed lie in the range of 40-50 cm in one trench and about 35 cm in the other. Thus, these displacements seem to confirm possible event magnitudes around M = 6.5 (e.g. Wells &Coppersmith 1994) which lie in the range of the known magnitudes of the Maravatío and Acambay earthquakes. We are also striving to date the landscape in the graben to get a better feel for the ages of features such as fault scarps in the area. To that end, we are trying to correlate river terrace levels and match alluvial fans across the graben. We intend to date these terraces using the OSL (Optically stimulated luminescence) technique. As the next step in the project, we will excavate trenches on the VBF. Astíz-Delgado, L. M. 1980: B.Sc. thesis, UNAM, Facultad de Ingeniería, 130 pp. Langridge, R. et al. 2000: JGR, 15(B2), 3019-3037. Suter, M. et al. 1995: Tectonics, 14(5), 1245-1262. Wells, D. L. &Coppersmith, K. J. 1994: BSSA, 84(4), 974-1002.

Persaud, M.; Zúñiga, F. R.; Aguirre-Díaz, G.; Villamor, P.; Langridge, R.

2006-12-01

346

Geological control of earthquake induced landslide in El Salvador  

NASA Astrophysics Data System (ADS)

Geological control of earthquake induced landslides in El Salvador. M., Tsige(1), I., Garcia-Flórez(1), R., Mateos(2) (1)Universidad Complutense de Madrid, Facultad de Geología, Madrid, Spain, (meaza@geo.ucm.es) (2)IGME, Mallorca El Salvador is located at one of the most seismically active areas en Central America, and suffered severe damage and loss of life in historical and recent earthquakes, as a consequence of earthquake induced landslides. The most common landslides were shallow disrupted soil-slides on steep slopes and were particularly dense in the central part of the country. Most of them are cited in the recent mechanically weak volcanic pyroclastic deposits known as "Tierra Blanca" and "Tierra Color Café" which are prone to seismic wave amplification and are supposed to have contributed to the triggering of some of the hundreds of landslides related to the 2001 (Mw = 7.6 and Mw = 6.7), seismic events. The earthquakes also triggered numerous deep large scale landslides responsible for the enormous devastation of villages and towns and are the source for the current high seismic hazard as well. Many of these landslides are located at distances more than 50 and 100 km from the focal distance, although some of them occurred at near field. Until now there has been little effort to explain the causes and concentration of the deep large-scale landslides especially their distribution, failure mechanism and post-rapture behavior of the landslide mass (long run-out). It has been done a field investigation of landslides, geological materiales and interpretation of aerial photographs taken before and after the two 2001 (Mw= 7.6 and Mw= 6.7) El Salvador earthquakes. The result of the study showed that most of the large-scale landslides occured as coherent block slides with the sliding surface parallel to a pre-existing fractures and fault planes (La Leona, Barriolera, El Desague, Jiboa landslides). Besides that the pre-existing fractures are weak zones controlling the mechanism and size of the slide, they may become the centre of seismic wave guiding and therefore of seismic energy entrapment producing a larger ground movement. On the other hand, the flow-like behavior of the landslide mass after failer is suggested to be controlled by the nature of the geological and geotechnical aspects of the materials. After seismic shaking the landslide mass mobilizes downslope up to hundreds of meters. This mobilization seemed to be due to a large deformation as a consecuence of structure colapse during seismic shaking. These generally are Miocene to Quaternary-aged thick volcanic pyroclasts, fall deposits and breccted tuffs inter-beded frequently by a thin volcanic ash. They consist of 50-60 per cent silt and sand particles with a few amount of clay which are evolving large andesitic blocks. Have a very open texture with a high void ratio and low density which confers an anomalous post-failure deformation. At their in situ state these materials possess high apparent strength due to primary weak chemical and silty-clay cementation but they are susceptible to large reductions in their strength due to shaking and flow like a semi-liquid mass (quick-silt), so that the mass will long run-out.

Tsige Aga, Meaza

2010-05-01

347

Calibration of three rainfall simulators with automatic measurement methods  

NASA Astrophysics Data System (ADS)

CALIBRATION OF THREE RAINFALL SIMULATORS WITH AUTOMATIC MEASUREMENT METHODS M. Roldán (1), I. Martín (2), F. Martín (2), S. de Alba(3), M. Alcázar(3), F.I. Cermeño(3) 1 Grupo de Investigación Ecología y Gestión Forestal Sostenible. ECOGESFOR-Universidad Politécnica de Madrid. E.U.I.T. Forestal. Avda. Ramiro de Maeztu s/n. Ciudad Universitaria. 28040 Madrid. margarita.roldan@upm.es 2 E.U.I.T. Forestal. Avda. Ramiro de Maeztu s/n. Ciudad Universitaria. 28040 Madrid. 3 Facultad de Ciencias Geológicas. Universidad Complutense de Madrid. Ciudad Universitaria s/n. 28040 Madrid The rainfall erosivity is the potential ability of rain to cause erosion. It is function of the physical characteristics of rainfall (Hudson, 1971). Most expressions describing erosivity are related to kinetic energy or momentum and so with drop mass or size and fall velocity. Therefore, research on factors determining erosivity leds to the necessity to study the relation between fall height and fall velocity for different drop sizes, generated in a rainfall simulator (Epema G.F.and Riezebos H.Th, 1983) Rainfall simulators are one of the most used tools for erosion studies and are used to determine fall velocity and drop size. Rainfall simulators allow repeated and multiple measurements The main reason for use of rainfall simulation as a research tool is to reproduce in a controlled way the behaviour expected in the natural environment. But in many occasions when simulated rain is used in order to compare it with natural rain, there is a lack of correspondence between natural and simulated rain and this can introduce some doubt about validity of data because the characteristics of natural rain are not adequately represented in rainfall simulation research (Dunkerley D., 2008). Many times the rainfall simulations have high rain rates and they do not resemble natural rain events and these measures are not comparables. And besides the intensity is related to the kinetic energy which determines the rainfall erosivity (Dunkerley D., 2008). A special attention must be paid to the experimental design and the understanding of the measurements obtained. The objective of this study is the calibration of simulated rain. In order to achieve this objective a rainfall simulator and disdrometer have been used. The first one is a nozzle type and its sprinkler system was located at different heights, three different spray nozzles supplied the water with known pressure. The simulated rainfall presented different intensities, drop diameters distribution and so different kinetic energy. The instrument of measurement for registering data is the disdrometer (Joss and Waldvogel, 1967) which provides the total number of impacts of raindrops, minute after minute, grouped in 20 classes according to their size which allows the real time measurements of the drop diameter distributions, kinetic energy per minute and intensity per minute. Disdrometer registers data in supposing drops fall down with terminal velocity but this velocity can reach up to 7-9 m of height in natural raindrop, depending on drop diameters. If the height of simulator is high enough the drops could recuperate their terminal velocities and their kinetic energies could be true. The nozzles were located to different heights in order to achieve these terminal velocities. These heights vary depending on the nozzles used, when the drops supplied by the nozzle are smaller the terminal velocity is reached sooner than when the drops are bigger. The physical characteristics of simulated rainfall in the three nozzles, intensity, drop diameter distributions and kinetic energy, are known and steady when the drops supplied by the nozzles reach terminal velocities.

Roldan, Margarita

2010-05-01

348

Lanthanide dinuclear complexes involving tetrathiafulvalene-3-pyridine-N-oxide ligand: semiconductor radical salt, magnetic, and photophysical studies.  

PubMed

Centro-symmetric dinuclear complexes of formula [Ln(tta)(3)(L)](2)·xCH(2)Cl(2), (tta(-) = 2-thenoyltrifluoroacetonate anion, x = 0.5 for Ln = Eu (1a), Tb (3), and Dy (4) and x = 0 for Ln = Eu (1b) and Nd (2)) have been synthesized using the tetrathiafulvalene-3-pyridine-N-oxide as a bridging ligand (L). X-ray structures have shown the formation of channels with CH(2)Cl(2) solvent inside. 1 is stable with both filled channels (at 150 K) and empty channels (at room temperature). The Dy(III) analogue displays a complex butterfly like hysteresis loop at 1.5 K. Photophysical properties of the coordination complexes have been studied by solution and solid-state absorption spectroscopy. Time-dependent density functional theory (TD-DFT) calculations have been carried out on the diamagnetic Y(III) derivative to shed light on the absorption spectrum. For 2, the excitation of the charge transfer transitions induces line shape emission in the near-infrared spectral range assigned to (4)F(3/2) ? (4)I(9/2), (4)F(3/2) ? (4)I(11/2), and (4)F(3/2) ? (4)I(13/2) neodymium centered transitions. The reversible redox-activity of the ligand L makes possible an original sensitization process involving a ligand centered charge separation followed by energy transfer to the Nd(III) ion upon recombination. PMID:23339398

Pointillart, Fabrice; Le Guennic, Boris; Maury, Olivier; Golhen, Stéphane; Cador, Olivier; Ouahab, Lahcène

2013-02-01

349

Meteosat Third Generation Lightning Imager: a discussion on user requirements and instrument features.  

NASA Astrophysics Data System (ADS)

For the next generation of earth observation geostationary satellite, major operating agencies are planning to insert an optical imaging mission, that continuously observes lightning pulses in the atmosphere; EUMETSAT has decided at the end of 2008 that one of the mission to be flown on MTG is LI, a Lightning Imager. The Centro Nazionale di Meteorologia e Climatologia Aeronautica recently hosted a fellowship sponsored by Selex Galileo, with the intent to study and perform a simulation of Meteosat Third Generation - Lightning Imager (MTG-LI) sensor behavior through Tropical Rainfall Measuring Mission - Lightning Imaging Sensor data (TRMM-LIS). MTG-LI mission has no Meteosat Second Generation heritage, but users need to evaluate the possible real time data output of the instrument to agree in inserting it on MTG payload. Authors took the expected LI design from MTG Mission Requirement Document, and reprocess real lightning dataset, acquired from space by TRMM-LIS instrument, to produce a simulated MTG-LI lightning dataset. The simulation is performed in several run, varying Minimum Detectable Energy, taking into account processing steps from event detection to final lightning information. A discussion on user requirements and instrument features is presented.

Biron, D.; de Leonibus, L.; Zauli, F.; Melfi, D.; Laquale, P.; Labate, D.

2009-04-01

350

Preliminary summary of the U.S. Geological Survey strong-motion records from the October 15, 1979 Imperial Valley earthquake  

USGS Publications Warehouse

This report summarizes the data from near-in strong-motion accelerograph stations operated by the U.S. Geological Survey in the Imperial Valley of California at the time of the October 15, 1979 Imperial Valley earthquake. The purpose of this report is to alert others as to the nature of the strong-motion data that is available from this event. In order to provide the information in a timely manner, the report has been limited to a summary of the data. A similar preliminary report of strong-motion data collected by the Office of Strong-Motion Studies of the California Division of Mines and Geology has already been issued. A more complete report of all of the strong ground motion data is contemplated. This will require the cooperation of all of the agencies in both the U.S. and Mexico that operate strong-motion instruments in the region. A report on the processing of the data from near-in stations is in preparation. The moderate-size (magnitude 6.4) October 15, 1979 Imperial Valley earthquake was instrumentally located on the Imperial fault approximately 25 km southeast of El Centro, California. This location is approximately the same as that of the 1940 Imperial Valley earthquake.

Porcella, R. L.; Matthiesen, R. B.

1979-01-01

351

Pictures cueing threat: brain dynamics in viewing explicitly instructed danger cues  

PubMed Central

Recent event-related brain potential studies revealed the selective processing of emotional and threatening pictures. Integrating the picture viewing and threat-of-shock paradigm, the present study examined the processing of emotional pictures while they were explicitly instructed to cue threat of real world danger (i.e. electric shocks). Toward this end, 60 pleasant, neutral and unpleasant IAPS-pictures were presented (1?s) as a continuous random stream while high-density EEG and self-reported threat were assessed. In three experimental runs, each picture category was used once as a threat-cue, whereas in the other conditions the same category served as safety-cue. An additional passive viewing run served as a no-threat condition, thus, establishing a threat–safety continuum (threat-cue–safety-cue–no-threat) for each picture category. Threat-of-shock modulated P1, P2 and parieto-occipital LPP amplitudes. While the P1 component differentiated among threat- and no-threat conditions, the P2 and LPP effects were specific to pictures signaling threat-of-shock. Thus, stimulus processing progressively gained more accurate information about environmental threat conditions. Interestingly, the finding of increased EPN and centro-parietal LPP amplitudes to emotional pictures was independent from threat-of-shock manipulation. Accordingly, the results indicate distinct effects associated with the intrinsic significance of emotional pictures and explicitly instructed threat contingencies.

Schupp, Harald T.

2012-01-01

352

[Clinical practice guideline. Traumatic urethral stenosis in males].  

PubMed

The incidence of urethral stenosis in Mexico had not been documented. At the Centro Médico Nacional La Raza, during the year 2010, 629 patients with urethral stenosis were attended as outpatient consultation: 85 % with previous urethral stenosis and 15 % with urethral treatment complication. Urethral stenosis is a chronic illness, with multiple etiological origins and the handling is controversial. It has a great negative impact for the patients and the recurrence reaches 85 %. The treatment consisted of an invasive approach (urethral dilations, endoscopy procedure) and open surgery (urethroplasty). The World Health Organization and World Alliance take the world challenge about the urinary tract infections associated with the attention of patients, focused on urethral stenosis. The objective of the following clinical guide is to offer to the health professional a clinical tool for making decisions in the handling of the hardship or masculine urethral stenosis, based on the best available evidence, carrying out in systematized form with bibliographical research using validated terms of the MeSH: urethral structures, in the databases Trip database, PubMed, Guideline Clearinghouse, Cochrane Library and Ovid. PMID:24021082

Serrano-Brambila, Eduardo Alonso; Moreno-Alcázar, Othón Martino; Neri-Páez, Edgar; Sánchez-Martínez, Luis Carlos; Hernández-Ordóñez, Octavio Francisco; Morales-Morales, Arturo; Basavilvazo-Rodríguez, M Antonia; Torres-Arreola, Laura del Pilar; Valenzuela-Flores, Adriana Abigail; Hernández-Valencia, Marcelino

2013-01-01

353

Efficiency of three diets for larval development in mass rearing Aedes albopictus (Diptera: Culicidae).  

PubMed

A fundamental step in establishing a mass production system is the development of a larval diet that promotes high adult performance at a reasonable cost. To identify a suitable larval diet for Aedes albopictus (Skuse), three diets were compared: a standard laboratory diet used at the Centro Agricoltura Ambiente, Italy (CAA) and two diets developed specifically for mosquito mass rearing at the FAO/IAEA Laboratory, Austria. The two IAEA diets, without affecting survival to the pupal stage, resulted in a shorter time to pupation and to emergence when compared with the CAA diet. At 24 h from pupation onset, 50 and 90% of the male pupae produced on the CAA and IAEA diets, respectively, had formed and could be collected. The diet received during the larval stage affected the longevity of adult males with access to water only, with best results observed when using the CAA larval diet. However, similar longevity among diet treatments was observed when males were supplied with sucrose solution. No differences were observed in the effects of larval diet on adult male size or female fecundity and fertility. Considering these results, along with the relative costs of the three diets, the IAEA 2 diet is found to be the preferred choice for mass rearing of Aedes albopictus, particularly if a sugar meal can be given to adult males before release, to ensure their teneral reserves are sufficient for survival, dispersal, and mating in the field. PMID:23926780

Puggioli, Arianna; Balestrino, F; Damiens, D; Lees, R S; Soliban, S M; Madakacherry, O; Dindo, M L; Bellini, R; Gilles, J R L

2013-07-01

354

First Contact with Astronomy for a Large Number of Pupils  

NASA Astrophysics Data System (ADS)

The Spanish Royal Society of Physics (RSEF) co-operates with several European institutions to promote Physics and Astronomy in schools through the project ""Fisica en Acción"". This project started in 2000 integrated with the project ""Physics on Stage"" created by CERN ESA and ESO. ""Fisica en Accion"" is a Spanish competition bringing together a group of teachers in a common endeavour: * showing ""physics demonstrations"" to general audiences * engaging pedagogical presentations to introduce science into the classroom. The national final event of this competition takes place annually in a science museum during one weekend (entrance is free). The Science Fair is especially well received by visitors who can ask the demonstrators-teachers questions. Younger visitors enjoy experimenting for themselves. After the first year the RSEF introduced special prizes to encourage schools to participate in astronomical categories. The ""Centro de Astrobiologia de Madrid"" gave a cash prize and a visit to their headquarters to the winners. The ""Instituto Astrofísico de Canarias"" offered a prize of a trip to its observatories. In summary the astronomical elements of ""Fisica en Acción"" stimulate the teachers and students' interest in international activities and has been the first contact with Astronomy for a large number of pupils.

Ros, Rosa M.

355

Beneficial lactobacilli: effects on the vaginal tract in a murine experimental model.  

PubMed

Vaginal probiotics containing lactic acid bacteria with activity towards pathogenic microorganisms that cause urogenital tract infections have been proposed as a valid strategy for their prophylaxis and therapy. A murine experimental model was set up to evaluate the colonization capability of beneficial human lactobacilli and their effects on the mouse vaginal mucosa and innate immune cells. Five Lactobacillus strains were intravaginally inoculated into previously estrogenized BALB/c mice. The significance of the effects observed in the vaginal tract was determined by analysis of variance using the general linear model. The numbers of viable vaginal lactobacilli were significantly higher at proestrous-estrous than those at the metaestrous-diestrous phase and decreased markedly on the days after inoculation. Lactobacilli inoculation did not cause cytological or histological modifications of the murine vaginal tract. Moreover, the intravaginal administration of Lactobacillus salivarius CRL (Centro de Referencia para Lactobacilos culture collection) 1328 and Lactobacillus gasseri CRL 1263 did not affect the amounts of granulocytes and macrophages present in vaginal washings. In conclusion, the results demonstrate that vaginal lactobacilli did not produce adverse effects on the murine vaginal tract. Therefore, they could be proposed as safe probiotic candidates to promote a balanced microbiota in the urogenital tract. PMID:22638932

De Gregorio, Priscilla Romina; Juárez Tomás, María Silvina; Santos, Viviana; Nader-Macías, María Elena Fatima

2012-11-01

356

Estimation of combined effects of carbon and nitrogen sources on the growth and bacteriocin production of Lactobacillus salivarius from human source.  

PubMed

Vaginal Lactobacillus salivarius CRL 1328 (Centro de Referencia para Lactobacilos Culture Collection) or the bacteriocin that produces could be included in a urogenital probiotic formula to prevent urogenital infections in women. The objective of this work was to determine the effects of different carbon and nitrogen sources on the growth and bacteriocin production of this microorganism. A fractional factorial design 3(5-1) was applied to evaluate the effects of five nutrients (glucose, lactose, yeast extract, tryptone and meat peptone), at three different concentrations (0, 1 and 2%). Results were statistically analyzed for linear and quadratic effects of nutrients, along with their interactions. All the nutrients tested stimulated the cell growth and bacteriocin production, but lactose had not a significant influence on the last response. The linear effects of higher magnitude on biomass and bacteriocin production were those of yeast extract and tryptone. The results demonstrated that there were significant interactions between the different nutrients, depending on the response evaluated. Maximum bacteriocin production was reached in different growth media with a lower cost than conventional culture media used in the laboratory. These findings will contribute to the design of a pharmaceutical product for the restoration of ecological balance of urogenital tract. PMID:20082367

Tomás, María Silvina Juárez; Bru, Elena; Nader-Macías, María Elena Fátima

2010-04-01

357

Astrophysical Plasmas: Codes, Models, and Observations  

NASA Astrophysics Data System (ADS)

The conference Astrophysical Plasmas: Codes, Models, and Observations was aimed at discussing the most recent advances, arid some of the avenues for future work, in the field of cosmical plasmas. It was held (hiring the week of October 25th to 29th 1999, at the Centro Nacional de las Artes (CNA) in Mexico City, Mexico it modern and impressive center of theaters and schools devoted to the performing arts. This was an excellent setting, for reviewing the present status of observational (both on earth and in space) arid theoretical research. as well as some of the recent advances of laboratory research that are relevant, to astrophysics. The demography of the meeting was impressive: 128 participants from 12 countries in 4 continents, a large fraction of them, 29% were women and most of them were young persons (either recent Ph.Ds. or graduate students). This created it very lively and friendly atmosphere that made it easy to move from the ionization of the Universe and high-redshift absorbers, to Active Galactic Nucleotides (AGN)s and X-rays from galaxies, to the gas in the Magellanic Clouds and our Galaxy, to the evolution of H II regions and Planetary Nebulae (PNe), and to the details of plasmas in the Solar System and the lab. All these topics were well covered with 23 invited talks, 43 contributed talks. and 22 posters. Most of them are contained in these proceedings, in the same order of the presentations.

Canto, Jorge; Rodriguez, Luis F.

2000-05-01

358

Modulations of EEG Beta Power during Planning and Execution of Grasping Movements  

PubMed Central

Although beta oscillations (? 13–35 Hz) are often considered as a sensorimotor rhythm, their functional role remains debated. In particular, the modulations of beta power during preparation and execution of complex movements in different contexts were barely investigated. Here, we analysed the beta oscillations recorded with electroencephalography (EEG) in a precued grasping task in which we manipulated two critical parameters: the grip type (precision vs. side grip) and the force (high vs. low force) required to pull an object along a horizontal axis. A cue was presented 3 s before a GO signal and provided full, partial or no information about the two movement parameters. We measured beta power over the centro-parietal areas during movement preparation and execution as well as during object hold. We explored the modulations of power in relation to the amount and type of prior information provided by the cue. We also investigated how beta power was affected by the grip and force parameters. We observed an increase in beta power around the cue onset followed by a decrease during movement preparation and execution. These modulations were followed by a transient power increase during object hold. This pattern of modulations did not differ between the 4 movement types (2 grips ×2 forces). However, the amount and type of prior information provided by the cue had a significant effect on the beta power during the preparatory delay. We discuss how these results fit with current hypotheses on the functional role of beta oscillations.

Zaepffel, Manuel; Trachel, Romain; Kilavik, Bj?rg Elisabeth; Brochier, Thomas

2013-01-01

359

Upgrade to the control system of the reflectometry diagnostic of ASDEX upgrade  

SciTech Connect

The broadband frequency modulation-continuous wave microwave/millimeter wave reflectometer of ASDEX upgrade tokamak (Institut fuer Plasma Physik (IPP), Garching, Germany) developed by Centro de Fusao Nuclear (Lisboa, Portugal) with the collaboration of IPP, is a complex system with 13 channels (O and X modes) and two types of operation modes (swept and fixed frequency). The control system that ensures remote operation of the diagnostic incorporates VME and CAMAC bus based acquisition/timing systems. Microprocessor input/output boards are used to control and monitor the microwave circuitry and associated electronic devices. The implementation of the control system is based on an object-oriented client/server model: a centralized server manages the hardware and receives input from remote clients. Communication is handled through transmission control protocol/internet protocol sockets. Here we describe recent upgrades of the control system aiming to: (i) accommodate new channels; (ii) adapt to the heterogeneity of computing platforms and operating systems; and (iii) overcome remote access restrictions. Platform and operating system independence was achieved by redesigning the graphical user interface in JAVA. As secure shell is the standard remote access protocol adopted in major fusion laboratories, secure shell tunneling was implemented to allow remote operation of the diagnostic through the existing firewalls.

Graca, S.; Santos, J.; Manso, M.E. [Associacao EURATOM/IST, Centro de Fusao Nuclear, Instituto Superior Tecnico, 1049-001 Lisbon (Portugal)

2004-10-01

360

Agricultural Damage and Recovery Notes Regarding the El Mayor - Cucapah Earthquake of April 4, 2010  

NASA Astrophysics Data System (ADS)

The Salton Trough in North America is the location of three large agricultural regions; the Mexicali Valley in Baja California, and the Imperial and Coachella Valleys in California. Damage from earthquakes in the region to irrigation and drainage systems and to farmlands has been reported in several regional earthquakes starting with the 1940 El Centro earthquake. The moment magnitude 7.2 El Mayor - Cucapah earthquake resulted in significant damage to irrigation and drainage canals in the Mexicali Valley and the loss of over 200 square kilometers of crops. The Imperial Valley suffered limited damage to canals and irrigation and drainage systems and farms. Recovery in the area is underway and in some areas may take a number of years due to not only deformation of farmlands and canals but also salting of farmlands from groundwater laden with salts and in some areas sulfur. Aftershocks have deformed locally regarded farmlands or canals and drains impeding water delivery, drainage of farmlands and the return of farmlands to productivity. Our presentation will focus on agricultural related impacts of the earthquake and aftershocks to the local and regional economy and discuss some of the efforts underway to recover from the earthquake and respond to and mitigate agricultural infrastructure damage from aftershocks.

Anderson, R.; McCarthy, R.; Mathieson, E. L.; Stenner, H. D.; Macari, E.; Mendoza, L.

2010-12-01

361

Seismic response analysis of the deep saturated soil deposits in Shanghai  

NASA Astrophysics Data System (ADS)

The quaternary deposits in Shanghai are horizontal soil layers of thickness up to about 280 m in the urban area with an annual groundwater table between 0.5 and 0.7 m from the surface. The characteristics of deep saturated deposits may have important influences upon seismic response of the ground in Shanghai. Based on the Biot theory for porous media, the water-saturated soil deposits are modeled as a two-phase porous system consisting of solid and fluid phases, in this paper. A nonlinear constitutive model for predicting the seismic response of the ground is developed to describe the dynamic characters of the deep-saturated soil deposits in Shanghai. Subsequently, the seismic response of a typical site with 280 m deep soil layers, which is subjected to four base excitations (El Centro, Taft, Sunan, and Tangshan earthquakes), is analyzed in terms of an effective stress-based finite element method with the proposed constitutive model. Special emphasis is given to the computed results of accelerations, excess pore-water pressures, and settlements during the seismic excitations. It has been found that the analysis can capture fundamental aspects of the ground response and produce preliminary results for seismic assessment.

Huang, Yu; Ye, Weimin; Chen, Zhuchang

2009-01-01

362

System identification of smart structures using a wavelet neuro-fuzzy model  

NASA Astrophysics Data System (ADS)

This paper proposes a complex model of smart structures equipped with magnetorheological (MR) dampers. Nonlinear behavior of the structure-MR damper systems is represented by the use of a wavelet-based adaptive neuro-fuzzy inference system (WANFIS). The WANFIS is developed through the integration of wavelet transforms, artificial neural networks, and fuzzy logic theory. To evaluate the effectiveness of the WANFIS model, a three-story building employing an MR damper under a variety of natural hazards is investigated. An artificial earthquake is used for training the input-output mapping of the WANFIS model. The artificial earthquake is generated such that the characteristics of a variety of real recorded earthquakes are included. It is demonstrated that this new WANFIS approach is effective in modeling nonlinear behavior of the structure-MR damper system subjected to a variety of disturbances while resulting in shorter training times in comparison with an adaptive neuro-fuzzy inference system (ANFIS) model. Comparison with high fidelity data proves the viability of the proposed approach in a structural health monitoring setting, and it is validated using known earthquake signals such as El-Centro, Kobe, Northridge, and Hachinohe.

Mitchell, Ryan; Kim, Yeesock; El-Korchi, Tahar

2012-11-01

363

The stochastic response of asymmetric base isolated buildings  

NASA Astrophysics Data System (ADS)

The coupled lateral-torsional stochastic response of an asymmetric one-storey base isolated building to earthquake excitation is presented. The stochastic model of the 1940 El-Centro earthquake, which preserves the non-stationary evolution of the amplitude and frequency content of the ground acceleration, is used as earthquake excitation. The base isolator consists of an array of elastomeric bearings between the base of the structure and its foundation. The root mean square (r.m.s.) response of the system is obtained under different parametric variations in order to investigate the effects of superstructure and isolator eccentricities on the stochastic response of a base isolated building. The system parameters include the eccentricity of the superstructure, the uncoupled torsional to lateral frequencies ratio of the superstructure, the eccentricity of the isolator, and the uncoupled torsional to lateral base isolation frequencies ratio of the isolator. It is shown that these parameters have considerable influence on the response of a base isolated structure and the effectiveness of base isolation in reducing the seismic forces in the superstructure.

Jangid, R. S.; Datta, T. K.

1995-01-01

364

Reservoir water level effects on nonlinear dynamic response of arch dams  

NASA Astrophysics Data System (ADS)

In this study, reservoir water level effects on nonlinear dynamic response of arch dams are investigated. For this purpose, the nonlinear behaviour of the dam concrete is idealized as elasto-plastic using the Drucker Prager model based on the associated flow rule assumption. Water in the reservoir is represented by the Lagrangian (displacement-based) fluid finite elements. The program NONSAP is modified for elasto-plastic analysis of fluid structure systems and employed in the response calculations. Nonlinear dynamic analysis of an arch dam subjected to earthquake ground motion is performed for five different water levels. The El-Centro N S component of the Imperial Valley earthquake, on May 18, 1940, has been used as the ground motion. The crest displacements, the maximum tensile stresses on the upstream and downstream faces of the dam and the time history of the yield function of an element in the dam body are presented. The results obtained from nonlinear analyses for different water levels are compared with each other. It is apparent that the reservoir water level effects must be considered in the elasto-plastic analyses of arch dams to earthquake ground motion.

Akkose, M.; Bayraktar, A.; Dumanoglu, A. A.

2008-04-01

365

Vibration control of hysteretic systems via neural network adaptive backstepping  

NASA Astrophysics Data System (ADS)

In this paper, an intelligent control methodology is proposed to mitigate earthquake vibrations in a building. The structure object of study is a 10-story building whose base is isolated by means of a passive actuator and an MR damper. The system has uncertain parameters and nonmeasurable variables that must be accounted for in order to gain good control performance. Besides, the system is subject to unknown perturbations (incoming earthquakes). An adaptive backstepping controller is designed to generate the actuator control signal based on the base velocity and displacement measurements as well as on the dynamics of the base isolation system. Uncertainty in structure stiffness and damping coefficients are compensated by parameter adaptation. The MR damper can be modeled by the well known Bouc-Wen model. However, this model contains an unmeasurable variable, z, that describes the hysteretic behavior, so it must be estimated. A neural network approximator is proposed to estimate the unmeasurable variable. This way, the hysteresis effect is modeled by the neural network. The control performance is verified by simulations performed in MATLAB/Simulink using common earthquakes such as those of El Centro and Taft.

Zapateiro, Mauricio; Luo, Ningsu

2008-05-01

366

Numerical evaluation of seismic response of shallow foundation on loose silt and silty sand  

NASA Astrophysics Data System (ADS)

This study includes the results of a set of numerical simulations carried out for sands containing plastic/non-plastic fines, and silts with relative densities of approximately 30-40% under different surcharges on the shallow foundation using FLAC 2D. Each model was subjected to three ground motion events, obtained by scaling the amplitude of the El Centro (1940), Kobe (1995) and Kocaeli (1999) Q12earthquakes. Dynamic behaviour of loose deposits underlying shallow foundations is evaluated through fully coupled nonlinear effective stress dynamic analyses. Effects of nonlinear soil structure interaction (SSI) were also considered by using interface elements. This parametric study evaluates the effects of soil type, structure weight, liquefiable soil layer thickness, event parameters (e.g., moment magnitude of earthquake ( M w ), peak ground acceleration PGA, PGV/PGA ratio and the duration of strong motion ( D 5-95) and their interactions on the seismic responses. Investigation on the effects of these parameters and their complex interactions can be a valuable tool to gain new insights for improved seismic design and construction.

Asgari, Ali; Golshani, Aliakbar; Bagheri, Mohsen

2014-03-01

367

Modeling and simulation of an amplified structural damping system in a seismically-excited truss tower  

NASA Astrophysics Data System (ADS)

In the present work, numerical simulations are carried out to investigate a passive amplified structural damping system, the scissor-jack damper, for controlling vibrations in a seismically-excited truss tower. To reduce computational effort, a bi-model method is employed to represent the 3D truss tower as a dynamically equivalent 2D lumped-mass model. For the scissor-jack damper, a new formulation for the amplification factor equation of the device is presented, and then validated using CAD. The new formulation accounts for the large deformations experienced by the device as a result of the large displacements present in the flexible tower during seismic loading. In order to capture the interaction between the structure and control device, the displacement-dependent amplification factors of the scissor-jack devices, and velocity-dependent forces of the dampers, are calculated at each time step. The resulting amplified damper force is then applied back to the structure to determine its response at the next time step. The response of the tower with scissor-jack damper systems is simulated for the El Centro and Northridge earthquakes, and time-histories of the displacement and absolute acceleration at each level of the tower are obtained. These results indicate that the system is effective in reducing overall response of the tower without exceeding practical limits on the stroke capacity of the scissor-jack dampers.

Walsh, Kenneth K.; Cronin, Kyle J.; Rambo-Roddenberry, Michelle D.; Grupenhof, Kyle

2010-03-01

368

Espectroscopía Espacial en el IR-Lejano  

NASA Astrophysics Data System (ADS)

Debido a la opacidad atmosférica, el dominio IR--lejano del espectro electromagnético ha sido la última ventana en ser utilizada por la Astrofísica Molecular. El potencial que supone abrir este nuevo rango de frecuencias a través de la espectroscopía molecular ha comenzado a ser explotado con el Infrared Space Observatory (ISO). La sensibilidad de la instrumentación embarcada en dicho satélite no tiene comparación alguna con las escasas misiones espaciales, o a bordo de aviones, realizadas con anterioridad a su lanzamiento. En particular, casi todo el rango operativo de ISO en el IR--lejano no había sido explorado. El espectro IR--lejano de las fuentes más representativas de la galaxia era desconocido y los principales emisores de radiación, las moléculas, estaban por identificar. Las observaciones en el IR--lejano están especialmente indicadas para el estudio del gas caliente en las nubes moleculares del medio interestelar y en el interior de las envolturas circunestelares alrededor de estrellas evolucionadas. Algunas de estas fuentes; Sgr B2 en el Centro Galáctico y las Proto--Nebulosas Planetarias, constituyen uno de los objetos más paradigmáticos en nuestra comprensión de la complejidad química de La Galaxia. En esta contribución se presentan los resultados espectroscópicos más importantes de algunas de estas fuentes astronómicas.

Goicoechea, Javier R.; Cernicharo, J.

369

Parametric identification of asymmetric buildings from earthquake response records  

NASA Astrophysics Data System (ADS)

This paper aims to evaluate the modal frequencies, damping ratios and mode shapes of an asymmetric building, modeled as general torsionally coupled buildings using a modified random decrement method together with the Ibrahim time domain technique based only on few floor acceleration response records from earthquakes. It is not necessary to measure earthquake excitation input. The general relationship between the reduced random decrement signature and the true free vibration response is derived analytically. Because only partial floor response measurements are used, a mode shape interpolation technique is developed to estimate the mode shape values for the locations without measurement, such that all floor responses can be obtained. The results were obtained from simulation data from a five-story building under the 1940 El Centro earthquake and actual records from a seven-story RC school building in north-eastern Taiwan, due to an earthquake near the building site. The results show that the proposed system identification technique is capable of identifying structural dominant modal parameters and responses accurately even with highly coupled modes and high levels of noise contamination.

Lin, C. C.; Hong, L. L.; Ueng, J. M.; Wu, K. C.; Wang, C. E.

2005-08-01

370

Estudio fotométrico y espectroscópico de dos cúmulos abiertos jóvenes del disco con apariencia globular  

NASA Astrophysics Data System (ADS)

Se presentan y discuten resultados obtenidos en el CASLEO y en el Observatorio de Las Campanas de dos cúmulos abiertos compactos con apariencia globular: Westerlund1 (BH197), ubicado en dirección hacia el centro galáctico, y Westerlund2. A partir de espectroscopía CCD integrada de ambos e imágenes CCD en las bandas VI obtenidas para el primero de ellos, se derivan sus parámetros fundamentales y se examinan sus apariencias estructurales. Se encuentra que Westerlund1 es un cúmulo joven (7 ± 3 millones de años), ubicado sobre el plano galáctico a 1.0 ± 0.4 kpc del sol, en una región caracterizada por una absorción excepcionalmente elevada (Av~=13.0 mag), en tanto que Westerlund2 es también un cúmulo joven (4-6 millones de años) ubicado sobre el plano, en una región afectada por una absorción menor (Av~=5.7 mag). Desde el punto de vista estructural, Westerlund 1 se presenta como uno de los pocos cúmulos abiertos jóvenes de la Galaxia con apariencia tipicamente globular, en contraste con los cúmulos azules de las Nubes de Magallanes en los cuales la apariencia globular constituye un fenómeno común. Westerlund2, aunque menos rico en estrellas, puede también ser incluído dentro de esta interesante clase de objetos.

Piatti, A. E.; Clariá, J. J.; Bica, E.

371

Crustal deformation across the Imperial Fault: Results from kinematic GPS surveys and trilateration of a densely spaced, small-aperture network  

NASA Astrophysics Data System (ADS)

Kinematic Global Positioning System (GPS) surveys in 1991 and 1993 of a 66-station, small-aperture network across a 12-km-long segment of the Imperial Fault near El Centro, California, reveal a fairly uniform secular displacement field consistent with right-lateral slip along a single, vertical dislocation surface. Total relative motion across the array equals 20±3 mm/yr at N49±7°W for sites 5-6 km away from the fault trace on opposite sides. These rates agree with simple dislocation models that assume 10 mm/yr of creep along the fault trace from the surface to a locking depth of 9 km and a plate boundary rate of 45 mm/yr oriented N40°W at depth. Model fit does not significantly improve if creep rates are permitted to vary along strike by several millimeters per year. A comparison of 1991/1993 GPS with 1987 high-precision electronic distance measurements validates the dislocation models but suggests a smoother deformation field than that defined by the 1991/1993 velocities. The difference can be attributed to the poorer 1991 kinematic positioning accuracy rather than to temporal variations in strain. There is evidence for 20 mm of sympathetic coseismic slip from the 1987 Superstition Hills earthquake, although aseismic slip along both faults appears to be completely decoupled.

Genrich, Joachim F.; Bock, Yehuda; Mason, Ronald G.

1997-03-01

372

Shake table test of soil-pile groups-bridge structure interaction in liquefiable ground  

NASA Astrophysics Data System (ADS)

This paper describes a shake table test study on the seismic response of low-cap pile groups and a bridge structure in liquefiable ground. The soil profile, contained in a large-scale laminar shear box, consisted of a horizontally saturated sand layer overlaid with a silty clay layer, with the simulated low-cap pile groups embedded. The container was excited in three El Centro earthquake events of different levels. Test results indicate that excessive pore pressure (EPP) during slight shaking only slightly accumulated, and the accumulation mainly occurred during strong shaking. The EPP was gradually enhanced as the amplitude and duration of the input acceleration increased. The acceleration response of the sand was remarkably influenced by soil liquefaction. As soil liquefaction occurred, the peak sand displacement gradually lagged behind the input acceleration; meanwhile, the sand displacement exhibited an increasing effect on the bending moment of the pile, and acceleration responses of the pile and the sand layer gradually changed from decreasing to increasing in the vertical direction from the bottom to the top. A jump variation of the bending moment on the pile was observed near the soil interface in all three input earthquake events. It is thought that the shake table tests could provide the groundwork for further seismic performance studies of low-cap pile groups used in bridges located on liquefiable groun.

Tang, Liang; Ling, Xianzhang; Xu, Pengju; Gao, Xia; Wang, Dongsheng

2010-03-01

373

Horizontal deformation in the Imperial Valley, California, between 1934 and 1980  

NASA Astrophysics Data System (ADS)

A triangulation-trilateration survey was performed by the National Ocean Survey/National Geodetic Survey four months prior to the October 15, 1979, Imperial Valley M 6.6 earthquake. The survey was repeated in February-March 1980 to gauge the coseismic displacement. These data combined with triangulation surveys performed in 1934-1935, 1939, 1941, 1954-1955, and 1967 provide a historical record of crustal deformation over a time period that also includes the 1940 El Centro M 7.1 earthquake. The total data set was analyzed in terms of a dislocation model that relates the observed surface deformation to slip on prescribed geologic faults. According to the model, the 1941-1980 fault slip at depths 10 km and greater is 1.9±0.3 m. This value is approximately twice the 1.0±0.1 m estimated for the 1941-1980 slip on the Imperial fault in the 0- to 10-km depth range. This discrepancy can be explained by a range of possibilities including the following: (1) some of the deep fault slip is due to aftereffects of the 1940 earthquake, in which case the seismic cycle over which deep slip and shallow slip are equal is not the interval between large earthquakes but is delayed a few years; (2) the deep slip should be equated to the shallow slip over several parallel faults; (3) the crust experienced permanent inelastic deformation; and (4) deep deformation is accommodated by a mechanism other than slip.

Snay, Richard A.; Cline, Michael W.; Timmerman, Edward L.

1982-05-01

374

An experimental study on AEKF method for damage detection of base-isolated structures  

NASA Astrophysics Data System (ADS)

Recently, an adaptive extended Kalman filter (AEKF) approach has been proposed for the damage identification and tracking of structures. Simulation and experimental studies have demonstrated that this AEKF approach is capable of tracking the damages for linear structures. In this paper, an experimental study is conducted and presented to verify the capability of the adaptive extended Kalman filter (AEKF) approach for identifying and tracking the damages in nonlinear structures. A base-isolated building model, consisting of a scaled building model mounted on a rubber-bearing isolation system, has been tested experimentally in the laboratory. The non-linear behavior of the base isolators is modeled by the Bouc-Wen model. To simulate the structural damages during the test, an innovative device, referred to as the stiffness element device (SED), is proposed to reduce the stiffness of either the upper story of the structure or the base isolator. Two earthquake excitations have been used to drive the test model, including the El Centro and Kobe earthquakes. Various damage scenarios have been simulated and tested. Measured acceleration response data and the AEKF approach are used to track the variation of the stiffness during the test. The tracking results for the stiffness variations correlate well with that of the referenced values. It is concluded that the AEKF approach is capable of tracking the variation of structural parameters leading to the detection of structural damages.

Yin, Qiang; Zhou, Li; Yang, Jann N.

2010-03-01

375

Decentralized sliding mode control of building using MR-dampers  

NASA Astrophysics Data System (ADS)

This paper presents the structural control results of shaking table tests for a steel frame structure in order to evaluate the performance of a number of proposed semi-active control algorithms using multiple magnetorheological (MR) dampers. The test structure is a six-story steel frame equipped with MR-dampers. Four different cases of damper arrangement in the structure are selected for the control study. In experimental tests, an EL Centro earthquake, a Kobe earthquake and a Chi-Chi earthquake (station TCU067) are used as ground excitations. Various control algorithms are used for this semi-active control studies, including the Decentralized Sliding Mode Control (DSMC), LQR control and passive-on and passive-off control. Each algorithm is formulated specifically for the use of MR-dampers. Additionally, each algorithm uses measurements of the absolute acceleration and the device velocity for the determination of the control action to ensure that the algorithm can be implemented on a physical structure. The performance of each algorithm is evaluated based on the results of shaking table tests, and the advantages of each algorithm is compared and discussed. The reduction of the story drift and acceleration throughout the structure is examined.

Lu, Kung-Chun; Loh, Chin-Hsiung; Yang, Jann N.; Lin, Pei-Yang

2008-05-01

376

Smart structures using shape memory alloys  

NASA Astrophysics Data System (ADS)

Elevated civil structure systems, such as communication towers and water tanks, are prone to higher mode vibration and earthquake induced damages. To mitigate damages, however, the structures are retrofitted with conventional (e.g. steel casing) and/or emerging techniques (e.g. smart structures). Smart structure entails integration of system behavior, control design and actuators. In this paper, utility of smart structures is illustrated through an elevated water tank concrete column. The concrete column is modeled as a continuous system, using the Lagrangian formulation, and linear quadratic regulator (LQR) is used for the control system, and shape memory alloy (SMA) for actuation. The water tank is excited with the 1940 El-Centro earthquake record. A sensitivity analysis is performed on the controller error and penalizing constants, as well as actuator location and angle of the connection. The four control variables that can be analyzed for the controller are: Rr, Qr, Re, and Qe, which are the control penalty, error penalty, measurement noise and process noise, respectively. The connection height on the beam and angle of the actuator is also analyzed for optimal performance. From the sensitivity analysis, the most efficient controller configuration is identified for further analysis of the structure. Optimal actuator configuration can be found based on the reduction of displacement versus the amount of energy used. It has been shown that using the SMA, the seismic demand on the concrete column is reduced using the SMA.

Clarke, J.; Tesfamariam, S.; Yannacopoulos, S.

2009-03-01

377

Amplification of in-plane seismic ground motion by group cavities in layered half-space (II): with saturated poroelastic soil layers  

NASA Astrophysics Data System (ADS)

As the continuation study on amplification of in-plane seismic ground motion by underground group cavities in layered half-space, this study extends to the case of poroelastic half-space with dry poroelastic and saturated poroelastic soil layers. The influence of poroelastic layers on the amplification of seismic ground motion is studied both in frequency domain and time domain using indirect boundary element method (IBEM). It is shown that for the example of a saturated poroelastic site in Tianjin under the excitation of Taft wave and El Centro wave, the amplification of seismic ground motion in poroelastic case is slightly smaller than that in the elastic case, and the amplification of PGA (peak ground acceleration) and its PRS (peak response spectrum) can be increased up to 38.8% and 64.6%; the predominant period of response spectra in poroelastic case becomes shorter to some extent compared with that in the elastic case. It is suggested that the effect of underground group cavities in poroelastic half-space on design seismic ground motion should be considered.

Liang, Jianwen; Zhang, Ji; Ba, Zhenning

2012-08-01

378

Active Structural Control Based on the Prediction and Degree of Stability  

NASA Astrophysics Data System (ADS)

Active control of buildings and structures for reducing damage due to earthquake and other environmental forces represents a relatively new research area. Most of the recent studies on this area are based on the applications of traditional linear quadratic regulator (LQR) control to the earthquake-excited structures. This paper presents the analytical solution of the modified linear quadratic regulator (MLQR) problem including a parameter ? known as system stability order in the presence of unknown seismic excitation. The resulting closed-open loop active control force depends on the system state, seismic excitation and ?. An approximate solution of the problem is based on the real-time prediction of near-future excitation. Since the primary focus of this study is on the relation between the system stability order? and the prediction of near-future excitation, numerical simulations of a three-storey undamped structure subjected to an El Centro earthquake are performed for different ? values. It is shown that the relative displacements can be reduced significantly for each selected ? value as the near-future excitation is predicted precisely and there is no significant increase in the control forces. The results also show that there is no need to predict the distant-future excitation to be able to achieve a given reduction in relative displacements as the system stability order ? is increased. It is also shown that the accelerations increase in general after the fourth-step ahead prediction for a given ? while they decrease as ? increases.

ALDEMIR, U.; BAKIOGLU, M.

2001-11-01

379

Application of two-dimensional finite-difference wave simulation to earthquakes, earth structure and seismic hazard  

NASA Astrophysics Data System (ADS)

The Earth is 3 dimensional (3-D), but numerical simulations of wave propagation through laterally heterogeneous media are easier to formulate and more efficient to use in 2-D. Schemes to model seismic wave propagation through laterally varying structures with 2-D numerical algorithms are developed and applied to earthquake and explosion problems. 2-D source expressions that have the same radiation patterns as their 3-D counterparts are derived. Synthetic seismograms are constructed for the strong motions of the 1968 Borrego Mountain earthquake recorded at El Centro. A good fit to the data results from using the laterally varying model determined by a detailed refraction survey and the source parameters determined by teleseismic waveform modeling. The effect of shallow station structure and lateral velocity variation are investigated for records of the Amchitka blast Milrow. Synthetic seismograms appropriate for a record section in a plane perpendicular to the strike of the slab are presented using a coupled finite difference and Kirchhoff method, for a 515 km deep earthquake. Slabs with only 2 to 3 percent P-wave velocity anomaly or slabs that become considerably thicker with depth are consistent with the data.

Vidale, John Emilio

380

Performance of smart structures  

NASA Astrophysics Data System (ADS)

This paper discusses the results of expanded study of series simulations conducted to compare the effectiveness of various control systems for earthquake hazard mitigation. A systematic comparison of the performance of different control systems will be useful for the designer in selecting the most effective control system for a structure. Ideal passive, active and semi-active control systems are employed in this study. For determining the control action, an H2/LQG control algorithm was selected for the active system and a clipped optimal control algorithm was selected for the semi- active system. In both cases the control algorithm was based on acceleration measurements for determination of the control action. To evaluate and compare the controllers, the structural responses of various 3, 6, and 10-story buildings are examined. An El Centro earthquake and pulse excitation are used as the ground excitations. The mass is held constant while the stiffness of the structure is varied to examine structures with a range of natural frequencies.

Yi, Fu; Dyke, Shirley J.

2000-04-01

381

Decentralized sliding mode control of a building using MR dampers  

NASA Astrophysics Data System (ADS)

This paper presents the structural control results of shaking table tests for a steel frame structure in order to evaluate the performance of a number of proposed semi-active control algorithms using multiple magnetorheological (MR) dampers. The test structure is a six-story steel frame equipped with MR dampers. Four different cases of damper arrangement in the structure are selected for the control study. In experimental tests, the El Centro earthquake and Kobe earthquake ground motion data are used as excitations. Further, several decentralized sliding mode control algorithms are developed in this paper specifically for applications of MR dampers in building structures. Various control algorithms are used for the semi-active control studies, including the proposed decentralized sliding mode control (DSMC), LQR control, and passive-on and passive-off control. Each control algorithm is formulated specifically for the use of MR dampers installed in building structures. Additionally, each algorithm uses measurements of the device velocity and device drift for the determination of the control action to ensure that the algorithm can be implemented in a physical structure. The performance of each algorithm is evaluated based on the results of shaking table tests, and the advantages of each algorithm are compared and discussed. The reduction of story drifts and floor accelerations throughout the structure is examined.

Lu, Kung-Chun; Loh, Chin-Hsiung; Yang, J. N.; Lin, Pei-Yang

2008-10-01

382

Assessment of skin and eye irritation of 14 products under the stepwise approach of the OECD.  

PubMed

The determination of acute eye and skin irritation is included in international regulatory requirements for the testing of chemicals, because of the possibility of exposure during the production, transport, marketing, and disposal of products. Although there have been some advances in the areas of refinement and reduction, no single battery of tests has emerged as being acceptable as a complete replacement for the conventional Draize rabbit eye and skin irritation tests. Currently, dermal irritation and ocular irritation are generally evaluated in a sequential manner in the context of tiered assessment strategies. In this work, we show how 14 products, mostly designed to be used in agriculture, were evaluated in the Center of Experimental Toxicology of the Center for the Production of Laboratory Animals (Centro Nacional para la Producción de Animales de Laboratorio; CENPALAB) in order to assess their acute dermal and ocular effects. The performed studies include the acute dermal toxicity test, the acute dermal irritation/corrosion test, the hen's egg test-chorioallantoic membrane (HET-CAM) method, and the acute eye irritation/corrosion test. In general, it could be concluded that of the 14 products assessed, none of them showed systemic effects, but local reactions mainly to the eyes. The most significant effects were apparently related to the effects of azadirachtin, an active principle of 2 tested neem derivatives. PMID:18988087

Mancebo, Axel; Hernández, Osvaldo; González, Yana; Aldana, Lizet; Carballo, Onelio

2008-01-01

383

Post-exposure targeting of specific epitopes on ricin toxin abrogates toxin-induced hypoglycemia, hepatic injury, and lethality in a mouse model.  

PubMed

Effects in the liver of fatal intoxication with the binary toxin ricin are unclear. We report a robust neutrophil influx into the liver of C57BL/6 mice after lethal parenteral ricin challenge, occurring in peri-portal and centro-lobular hepatic areas within 2 h, followed by the abrupt disappearance of hepatic macrophages/Kupffer cells. Chemokine profiles determined by microarray, ribonuclease protection assays, northern blotting, and enzyme-linked immunosorbent assays showed rapid (2 h) upregulation and persistence of those for neutrophils (CXCL1/KC, CXCL2/MIP-2) and monocytes (CCL2/MCP-1). Red blood cell pooling (8-12 h), loss of hepatocyte glycogen (8-48 h) associated with progressive hypoglycemia, fibrin deposition (24-48 h), and death (72-96 h) followed. Monoclonal antibody to ricin A chain, administered intravenously, blunted hypoglycemia, and abrogated death. This outcome was observed when anti-ricin antibody was given before toxin exposure as well as when administered approximately 10 h after toxin exposure. Targeting antibody to specific amino-acid sequences on the ricin A chain (HAEL and QXXWXXA) was critical to the therapeutic effect. Re-emergence of liver macrophages/Kupffer cells and replenishment of glycogen in previously depleted hepatocytes preceded full recovery of the host. These data identify critical events for liver injury and healing in ricin intoxication, as well as a new means and specific targets for post-exposure therapeutic intervention. PMID:18779782

Roche, James K; Stone, Matthew K; Gross, Lisa K; Lindner, Matthew; Seaner, Regina; Pincus, Seth H; Obrig, Tom G

2008-11-01

384

Geant4 studies of the CNAO facility system for hadrontherapy treatment of uveal melanomas  

NASA Astrophysics Data System (ADS)

The Italian National Centre of Hadrontherapy for Cancer Treatment (CNAO -Centro Nazionale di Adroterapia Oncologica) in Pavia, Italy, has started the treatment of selected cancers with the first patients in late 2011. In the coming months at CNAO plans are to activate a new dedicated treatment line for irradiation of uveal melanomas using the available active beam scan. The beam characteristics and the experimental setup should be tuned in order to reach the necessary precision required for such treatments. Collaboration between CNAO foundation, University of Pavia and INFN has started in 2011 to study the feasibility of these specialised treatments by implementing a MC simulation of the transport beam line and comparing the obtained simulation results with measurements at CNAO. The goal is to optimise an eye-dedicated transport beam line and to find the best conditions for ocular melanoma irradiations. This paper describes the Geant4 toolkit simulation of the CNAO setup as well as a modelised human eye with a tumour inside. The Geant4 application could be also used to test possible treatment planning systems. Simulation results illustrate the possibility to adapt the CNAO standard transport beam line by optimising the position of the isocentre and the addition of some passive elements to better shape the beam for this dedicated study.

Rimoldi, A.; Piersimoni, P.; Pirola, M.; Riccardi, C.

2014-06-01

385

The next generation of interoperability agents in healthcare.  

PubMed

Interoperability in health information systems is increasingly a requirement rather than an option. Standards and technologies, such as multi-agent systems, have proven to be powerful tools in interoperability issues. In the last few years, the authors have worked on developing the Agency for Integration, Diffusion and Archive of Medical Information (AIDA), which is an intelligent, agent-based platform to ensure interoperability in healthcare units. It is increasingly important to ensure the high availability and reliability of systems. The functions provided by the systems that treat interoperability cannot fail. This paper shows the importance of monitoring and controlling intelligent agents as a tool to anticipate problems in health information systems. The interaction between humans and agents through an interface that allows the user to create new agents easily and to monitor their activities in real time is also an important feature, as health systems evolve by adopting more features and solving new problems. A module was installed in Centro Hospitalar do Porto, increasing the functionality and the overall usability of AIDA. PMID:24840351

Cardoso, Luciana; Marins, Fernando; Portela, Filipe; Santos, Manuel; Abelha, António; Machado, José

2014-05-01

386

The time course of semantic richness effects in visual word recognition  

PubMed Central

The richness of semantic representations associated with individual words has emerged as an important variable in reading. In the present study we contrasted different measures of semantic richness and explored the time course of their influences during visual word processing as reflected in event-related brain potentials (ERPs). ERPs were recorded while participants performed a lexical decision task on visually presented words and pseudowords. For word stimuli, we orthogonally manipulated two frequently employed measures of semantic richness: the number of semantic features generated in feature-listing tasks and the number of associates based on free association norms. We did not find any influence of the number of associates. In contrast, the number of semantic features modulated ERP amplitudes at central sites starting at about 190 ms, as well as during the later N400 component over centro-parietal regions (300–500 ms). Thus, initial access to semantic representations of single words is fast and word meaning continues to modulate processing later on during reading.

Rabovsky, Milena; Sommer, Werner; Abdel Rahman, Rasha

2012-01-01

387

[Focus of childhood obesity from pediatrics].  

PubMed

The prevalences of overweight and obesity have increased dramatically in the last two decades in the adult and children population. The Organization for Cooperation and Economic Development reported in 2010 that Mexico ranks first worldwide in childhood obesity. The 2006 National Health and Nutrition Survey reported that one of every three teenagers are overweight and obese. In the last decades, pediatric hospitals in different parts of the world reported the prevalence of secondary malnutrition, since in those days overweight and obesity did not represent health problems. Currently, the prevalence of overweight and obesity has been scarcely studied in pediatric hospitals. In the Hospital de Pediatría (Children's Hospital) of the Instituto Mexicano del Seguro Social's Centro Médico Nacional de Occidente it is reported a prevalence of overweight of 15.4 % and obesity of 12.2 %, which reflects a nutritional transition.Due to the high prevalence of overweight and obesity in this pediatric hospital of reference, one could conclude that the pediatrician should be able to make a correct evaluation of the nutritional state, because, if he does not detect these problems, we will be condemning children to suffer from a chronic disease for the rest of their lives, and with all the implications in the short, medium and long term. PMID:24866318

Hurtado-López, Erika F; Macías-Rosales, Rocío

2014-05-01

388

Preliminary Analysis of Remote Triggered Seismicity in Northern Baja California Generated by the 2011, Tohoku-Oki, Japan Earthquake  

NASA Astrophysics Data System (ADS)

We analyze possible variations of seismicity in the northern Baja California due to the passage of seismic waves from the 2011, M9.0, Tohoku-Oki, Japan earthquake. The northwestern area of Baja California is characterized by a mountain range composed of crystalline rocks. These Peninsular Ranges of Baja California exhibits high microseismic activity and moderate size earthquakes. In the eastern region of Baja California shearing between the Pacific and the North American plates takes place and the Imperial and Cerro-Prieto faults generate most of the seismicity. The seismicity in these regions is monitored by the seismic network RESNOM operated by the Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE). This network consists of 13 three-component seismic stations. We use the seismic catalog of RESNOM to search for changes in local seismic rates occurred after the passing of surface waves generated by the Tohoku-Oki, Japan earthquake. When we compare one month of seismicity before and after the M9.0 earthquake, the preliminary analysis shows absence of triggered seismicity in the northern Peninsular Ranges and an increase of seismicity south of the Mexicali valley where the Imperial fault jumps southwest and the Cerro Prieto fault continues.

Wong-Ortega, V.; Castro, R. R.; Gonzalez-Huizar, H.; Velasco, A. A.

2013-05-01

389

Chilean Astronomers and the Birth of Cerro Tololo  

NASA Astrophysics Data System (ADS)

P# JMEN. Hace treinta afios que se tnict6 en Chile la de n luga adecuado pata establecer observatoro astron6ini- Co, que a en wi ieflector de 1 in de diam'etrr . importante destacar el papel que le corres-pondi6 al Obseiwatorio Nacional de Ia Universidad de `Chile -- re'.-. tarde Departamento de de la inisma Univer- sidad .- en 1 de este proycoto. Los resultados han ido mucho mct5 impoftaftes lo esperado . de tal nodo q. el prc -ama destinado a instalar ui telescopio de tama- f ha I levado al establ ecimiento de iri centro de acti- cientfica de relieve inten-acional. ALb(TRA . Thifty years ago the search for a site adequate for the est 1ishment of an astronomical was fn (Thile. Initially it was planned that the main telescope would be a 1 in i-cf lector. It is importaft to the role played by th O Astm-'n6mioo Nacional de la Unfversidad de Cbf Ic - later 0: Depaftamento de of the same University - in the development of this project. The results have been much more important than was e:-:pected initially: in thiS way the prr gram for a telescope of moderate size was transfo -med in a major project wh i ch 1 cad to the estab 1 ). shinent of an i nt i ona 1 center of scieftific research. AQ/ W : OBSERVATORIES

Moreno, H.

1990-11-01

390

A New Four-Barrel Pellet Injection System for the TJ-II Stellarator  

SciTech Connect

A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energ ticas, Medioambientales y Tecnol gicas (CIEMAT). ORNL is providing most of the injector hardware and instrumentation, the pellet diagnostics, and the pellet transport tubes; CIEMAT is responsible for the injector stand/interface to the stellarator, cryogenic refrigerator, vacuum pumps/ballast volumes, gas manifolds, remote operations, plasma diagnostics, and data acquisition. The pellet injector design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation and a combined mechanical punch/propellant valve system for pellet acceleration (speeds ~100 to 1000 m/s). On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those typically used for the MST application are required. The system will initially be equipped with four different pellet sizes, with the gun barrel bores ranging between ~0.5 to 1.0 mm. The new system is almost complete and is described briefly here, highlighting the new features added since the original MST injector was constructed. Also, the future installation on TJ-II is reviewed.

Combs, Stephen Kirk [ORNL] [ORNL; Foust, Charles R [ORNL] [ORNL; McGill, James M [ORNL] [ORNL; Baylor, Larry R [ORNL] [ORNL; Caughman, John B [ORNL] [ORNL; Fehling, Dan T [ORNL] [ORNL; Harris, Jeffrey H [ORNL] [ORNL; Meitner, Steven J [ORNL] [ORNL; Rasmussen, David A [ORNL] [ORNL; McCarthy, K. J. [EURATOM-CIEMAT, Madrid, Spain] [EURATOM-CIEMAT, Madrid, Spain; Chamorro, M. [Laboratory Nacional de Fusion, Madrid, Spain] [Laboratory Nacional de Fusion, Madrid, Spain; Garcia, R. [Laboratory Nacional de Fusion, Madrid, Spain] [Laboratory Nacional de Fusion, Madrid, Spain; Hildago, C. [Laboratory Nacional de Fusion, Madrid, Spain] [Laboratory Nacional de Fusion, Madrid, Spain; Medrano, M. [Laboratory Nacional de Fusion, Madrid, Spain] [Laboratory Nacional de Fusion, Madrid, Spain; Unamuno, R. [Laboratory Nacional de Fusion, Madrid, Spain] [Laboratory Nacional de Fusion, Madrid, Spain

2011-01-01

391

HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT  

NASA Astrophysics Data System (ADS)

Context: We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations. Aims: We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars. Methods: We used standard Fourier transform and pre-whitening methods to extract information about the periodicities of the stars. Results: HD 51106 is an ellipsoidal binary, the light curve of which can be completely explained by the tidal deformation of the star and smaller secondary effects. HD 50747 is a triple system containing a variable star, which exhibits many modes of oscillation with periods in the range of a few hours. On the basis of this period range and the analysis of the physical parameters of the star, we conclude that HD 50747 is a ?-Doradus star. Based on observations obtained by CoRoT, a space project operated by the French Space Agency (CNES) with the participation of the Science Program of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany, and Spain. Also based on observations made with ESO telescopes at the La Silla Observatory under the ESO large program LP178.D-0361, at the Observatoire de Haute Provence, INSU/CNRS, France, and on observations collected at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck Institut für Astronomie and the Instituto de Astrofísica de Andalucía.

Dolez, N.; Vauclair, S.; Michel, E.; Hui-Bon-Hoa, A.; Vauclair, G.; Le Contel, D.; Mathias, P.; Poretti, E.; Amado, P. J.; Rainer, M.; Samadi, R.; Baglin, A.; Catala, C.; Auvergne, M.; Uytterhoeven, K.; Valtier, J.-C.

2009-10-01

392

Skin involvement in Susac's syndrome.  

PubMed

Susac's syndrome (SS) is a rare microangiopathy affecting the precapillary arterioles of the brain, retina and inner ear, presumably resulting from an autoimmune endotheliopathy. We report the first case of SS with histologically proven skin involvement, in a 24-year-old male who presented a subacute encephalopathy, branch retinal artery occlusions and bilateral hearing loss, two weeks after the onset of a livedo racemosa of the flanks and feet. Skin biopsies revealed a thrombus in several dermal arterioles, endothelial cells swelling and a mild perivascular lymphocytic infiltrate, which correspond to the same histological findings as previously observed in brain but also in muscle biopsies of patients with SS. A complete recovery was achieved in 4 months with corticosteroids. Follow-up MRI showed centro-callosal "holes". Skin involvement in SS has pathological plausibility since serum antibodies directly binding to central nervous system but also to generic endothelium cells have been reported. Our report supports that SS is a systemic disease that could affect other organs in addition to the brain, retina and inner ear. We suggest careful skin examination should be considered in patients with a suspicion of SS. PMID:21440909

Turc, Guillaume; Monnet, Dominique; Dupin, Nicolas; Beuvon, Frédéric; Guiraud, Vincent; Ben Amor, Mejdi; Touzé, Emmanuel

2011-06-15

393

An integrated approach for the evaluation of technological hazard impacts on air quality: the case of the Val d'Agri oil/gas plant  

NASA Astrophysics Data System (ADS)

The Val d'Agri area (southern Italy) hosts the biggest on-shore European reservoir and the largest oil/gas pre-treatment plant, named Centro Olio Val d'Agri (COVA), located in a rural/anthropized context. Several hazards are associated to this plant. These are mainly represented by possible impacts of the COVA atmospheric emissions on the local air quality and human health. This work uses a novel approach based on the integration of air quality measurements from the regional monitoring network, additional experimental measurements (i.e., sub-micrometric particulate matter - PM1 and Black Carbon - BC) and advanced statistical analyses to provide a preliminary evaluation of the Val d'Agri air quality state and give some indications of specific areas potentially affected by COVA hazards. Results show that the COVA plant emissions exert an impact especially on the air quality of the area closest to it. In this area several pollutants specifically related to the COVA combustion processes (i.e., nitrogen oxides, benzene and toluene) show the highest concentration values and significant correlations. The proposed approach represents a first step in the assessment of the risks associated to oil/gas exploration and pre-treatment activities and a starting point for the development of effective and exportable air quality monitoring strategies.

Calvello, M.; Esposito, F.; Trippetta, S.

2014-04-01

394

Bilateral Comparison Between CEM and LACOMET in the Range from 83.8058 K to 933.473 K, Linking to CCT Comparisons  

NASA Astrophysics Data System (ADS)

A bilateral comparison between Centro Español de Metrología (CEM) and Laboratorio Costarricense de Metrología (LACOMET) in the range from 83.8058 K to 933.473 K was carried out during 2009, and it is aimed to provide linkage of the CCT key comparisons K3 and K4 to LACOMET. This comparison gives support to the calibration measurement capabilities requested by LACOMET. The participation of CEM in the EURAMET regional comparisons EUROMET-T.K3 and EUROMET-T.K4 is the basis of the link. Two 25 ? standard platinum resistance thermometers (SPRTs) were used as travelling standards and were hand carried. One of them was used only in the aluminum freezing point while the other one covered the remaining fixed points. At the temperature of the argon triple point (83.8058 K), CEM performed the measurements in an argon triple-point apparatus, but LACOMET calibrated the SPRT at a temperature close to the argon point using a liquid-nitrogen boiling-point apparatus. Both SPRTs were provided by LACOMET, and LACOMET measured them before and after CEM. The SPRTs showed no significant drifts during the comparison. The results for both laboratories agreed within their expanded uncertainties and are summarized. A proposal for the linkage to the results of CCT-K3 and CCT-K4 is presented.

del Campo, D.; García, C.; Solano, A.

2011-01-01

395

Development of a hydrokinetic device for the generation of electricity suitable for low - speeds Hidropólio ®  

NASA Astrophysics Data System (ADS)

The difficulty of exploiting energy without damaging the environment is a highly discussed topic. The lack of energy (electricity) is actually an issue of nature preservation and it is also an obstacle. One solution to these problems is renewable energy, which affects the environment less. However, these energies are sometimes infeasible due to its high costs, by the potential energy generated that in most cases is not sufficient enough to enable them economically. However, there are some of them that have an acceptable power generation, as is in the case of hydrokinetic energy. There are many ways of taking advantage of this type of energy, some of them costly, some very complex and others still in development and/or unprecedented as is the case with "Hidropólio"®, presented in this article. This article describes the equipment and its operating principle and also presents the results obtained in laboratory tests at the National Center of References of SHPs - CERPCH (Centro Nacional de Referências em Pequenas Centrais Hidrelétricas- CERPCH) at the Federal University of Itajubá - UNIFEI, whose results proved quite promising, mainly for use in sections of shallow river and low speeds.

Filho, G. L. T.; da Silva, F. das G. B.; Barros, R. M.; Guimarães, L. M.; Silva, B. O. P. e.

2010-08-01

396

Physicochemical factors differentially affect the biomass and bacteriocin production by bovine Enterococcus mundtii CRL1656.  

PubMed

Bovine Enterococcus mundtii CRL1656 (Centro de Referencia para Lactobacilos Culture Collection) produces an anti-Listeria and anti-Streptococcus dysgalactiae bacteriocin identified as mundticin CRL1656. The strain and its bacteriocin are candidates to be included in a beneficial product to prevent bovine mastitis as an alternative to antimicrobial agents. To optimize the production of biomass and mundticin CRL1656 by E. mundtii CRL1656, a complete 3×2(4) factorial design was applied. The effect of culture medium, initial pH, inoculum size, incubation temperature, and agitation conditions on biomass and bacteriocin production was evaluated simultaneously. Growth parameters were determined using the modified Gompertz model. A nonlinear model was used to estimate the effects of the variables on growth parameters. Bacteriocin production was analyzed using a linear mixed model. Optimal biomass and mundticin CRL1656 production by E. mundtii CRL1656 were obtained in different conditions. Maximal growth was recorded in autolyzed yeast, peptone, tryptone, Tween 80, and glucose or M17 broths, pH 6.5, 5.0% inoculum, 30°C, with agitation. However, bacteriocin titers were higher in autolyzed yeast, peptone, tryptone, Tween 80, and glucose or de Man-Rogosa-Sharpe (MRS) broths, pH 6.5, 30°C, both with or without agitation. Knowledge of the optimum conditions for growth and bacteriocin production of E. mundtii CRL1656 will allow the obtainment of high levels of biomass and mundticin CRL1656 as bioingredients of potential products to prevent bovine mastitis. PMID:24359825

Espeche, M Carolina; Tomás, M Silvina Juárez; Wiese, Birgitt; Bru, Elena; Nader-Macías, M E Fátima

2014-02-01

397

Wheat genotypic variability in grain yield and carbon isotope discrimination under Mediterranean conditions assessed by spectral reflectance.  

PubMed

A collection of 368 advanced lines and cultivars of spring wheat (Triticum aestivum L.) from Chile, Uruguay, and CIMMYT (Centro Internacional de Mejoramiento de Maíz y Trigo), with good agronomic characteristics were evaluated under the Mediterranean conditions of central Chile. Three different water regimes were assayed: severe water stress (SWS, rain fed), mild water stress (MWS; one irrigation around booting), and full irrigation (FI; four irrigations: at tillering, flag leaf appearance, heading, and middle grain filling). Traits evaluated were grain yield (GY), agronomical yield components, days from sowing to heading, carbon isotope discrimination (?(13) C) in kernels, and canopy spectral reflectance. Correlation analyses were performed for 70 spectral reflectance indices (SRI) and the other traits evaluated in the three trials. GY and ?(13) C were the traits best correlated with SRI, particularly when these indices were measured during grain filling. However, only GY could be predicted using a single regression, with Normalized Difference Moisture Index (NDMI2: 2,200; 1,100) having the best fit to the data for the three trials. For ?(13) C, only individual regressions could be forecast under FI (r(2): 0.25-0.37) and MWS (r(2): 0.45-0.59) but not under SWS (r(2): 0.03-0.09). NIR-based SRI proved to be better predictors than those that combine visible and NIR wavelengths. PMID:24118723

Lobos, Gustavo A; Matus, Iván; Rodriguez, Alejandra; Romero-Bravo, Sebastián; Araus, José Luis; del Pozo, Alejandro

2014-05-01

398

Modulations of EEG beta power during planning and execution of grasping movements.  

PubMed

Although beta oscillations (? 13-35 Hz) are often considered as a sensorimotor rhythm, their functional role remains debated. In particular, the modulations of beta power during preparation and execution of complex movements in different contexts were barely investigated. Here, we analysed the beta oscillations recorded with electroencephalography (EEG) in a precued grasping task in which we manipulated two critical parameters: the grip type (precision vs. side grip) and the force (high vs. low force) required to pull an object along a horizontal axis. A cue was presented 3 s before a GO signal and provided full, partial or no information about the two movement parameters. We measured beta power over the centro-parietal areas during movement preparation and execution as well as during object hold. We explored the modulations of power in relation to the amount and type of prior information provided by the cue. We also investigated how beta power was affected by the grip and force parameters. We observed an increase in beta power around the cue onset followed by a decrease during movement preparation and execution. These modulations were followed by a transient power increase during object hold. This pattern of modulations did not differ between the 4 movement types (2 grips ×2 forces). However, the amount and type of prior information provided by the cue had a significant effect on the beta power during the preparatory delay. We discuss how these results fit with current hypotheses on the functional role of beta oscillations. PMID:23555884

Zaepffel, Manuel; Trachel, Romain; Kilavik, Bjørg Elisabeth; Brochier, Thomas

2013-01-01

399

[Postero'inferior aneurysm of the left ventricle following myocardial infarction. Diagnosis and surgical treatment].  

PubMed

This is a report of the first four cases of left ventricle aneurysm of the posterior and inferior segments successfully treated surgically in the Hospital de Cardiología y Neumología del Centro Médico Nacional, México D. F., and represent the twelve per cent of all realized aneurysmectomies. The patients were all men with 57 years mean age, and a previous history of posteroinferior myocardial infarction, complicated in three of them with angor and severe ventricle arrythmias; chest X ray in lateral view showed a bump of the posteroinferior border of the cardiac silhouette; the echocardiography increase in the ventricular diameter below the mitral valve; the ventriculography made evident a diastolic bulging with systolic expansion of posterior and inferior segments of the left ventricle and no mitral regurgitation; selective coronary arteriography showed a dominant right pattern with 100 per cent proximal occlusion. Aneurysmectomy was done in all four cases and aortocoronary by-pass in two. The posteromedial papilar muscle was found respected in all cases and in two cases a mural thrombus was detected. PMID:318079

Flores Covarrubias, S E; Acoltzin Vidal, C; Nava Lopez, G; Palacios Macedo, X

1979-01-01

400

Cancellous bone homograft storage with aluminium-polyethylene bags.  

PubMed

In order to transport and cryopreserve human tissues, it is essential to have an easy-to-use recipient where tissues can be kept in sterile conditions. Here we show the results obtained by using Macopharma's tissue freezing bags, an aluminium-polyethylene multilayer bag, in our tissue bank of the Centro Comunitario de Sangre y Tejidos de Asturias. Five hundred and twenty-seven cancellous bone homografts were obtained from hospitals located 120 km around our Bank. The homografts were submitted to bacteriological controls and sent to our bank in these bags. They were stored at -70 degrees C and sent in dry ice to about 50 hospitals, where the tissue was bacteriologically controlled and grafted. Furthermore, the behaviour of these bags at -140 degrees C (vapour nitrogen) or -196 degrees C (liquid nitrogen) was tested. Our results indicate that Macopharma aluminium-polyethylene bags are suitable for the transporting and cryopreserving of cancellous bone homografts. These bags could also be used for keeping tissues in nitrogen containers. PMID:16933042

Meana, A; Martinez, R; Cañal, P; Arriaga, M J; Román, F San; Llames, S; Orós, C; Moreno, A; Fernandez, C

2006-01-01

401

Synthesis, structure and thermal stability of ternary metal complexes based on polycarboxylate and N-heterocyclic ligands  

NASA Astrophysics Data System (ADS)

The reactions of metal salts with pyrazine-2,3-dicarboxylic acid (H 2pzdc), pyridine-2,5-dicarboxylic acid (H 2pydc), pyrazine-2,3,5,6-tetracarboxylic acid (H 4pztc), 4,4'-bipyridine (bipy) and 1,10-phenanthroline (phen) afforded four new ternary complexes, namely [Co 2(pzdc) 2(bipy)(H 2O) 2] n·3 nH 2O ( 1), [Zn 2(pzdc) 2(bipy)(H 2O) 2] n·3 nH 2O ( 2), [Co(pydc) 2(H 2O) 2](H 2bipy) ( 3) and [Cu 2(pztc)(phen) 2(H 2O) 2]·2HNO 3·2H 2O ( 4). The metal centers are all six-coordinated. Compounds 1 and 2 are 2D coordination polymers exhibiting wave-like polymeric networks. The 2D layers are stacked in an interpenetrating mode to form double-layered frameworks, which possess ˜8 Å×6 Å tunnels occupied by (H 2O) 6 clusters. Compound 3 is a mononuclear supramolecular compound in which 4,4'-bipyridine is protonated and acted as a cationic building block. Compound 4 is a centro-symmetric binuclear complex. Pztc 4- as a hexadentate ligand coordinates to two Cu(II) ions to form four chelating rings. Phen are arranged in an ABAB parallel fashion to form a supramolecular architecture incorporating HNO 3 lattice molecule. The thermal stabilities of 1- 4 and luminescence of zinc complex 2 were also investigated.

Fang, Ming-Jin; Li, Ming-Xing; He, Xiang; Shao, Min; Pang, Wei; Zhu, Shou-Rong

2009-03-01

402

[120 biopsies of pituitary adenomas studied by immunohistochemistry and electron microscopy. A clinico-pathological correlation].  

PubMed

Study of biopsies from 120 pituitary adenomas from the Hospital de Especialidades, Centro Médico Nacional, and the Hospital 20 de Noviembre, ISSSTE, were studied over a period of 55 months. 70 cases were female and 50 male. Ages varied between 18 and 67 years of age (with an average of 31 years). Histologically 41 tumors were chromophobes, 34 acidophilic, 37 mixed and 8 basophilic. 101 patients were operated by trans-sphenoidal (84.5%) and 19 were operated (15.5%) by trans-cranial approaches. 99 tumors were macroadenomas (81.1%) and 21 were microadenomas (18.9%). More than one hormone was found in the cytoplasm of 69 adenomas, although only 20 fulfilled the criteria of being plurihormonal. Those adenomas classified as "non-functional", mostly produced glycoprotein hormones corresponding to oncocytomas and null cell adenomas, from an ultrastructural point of view. 85 patients developed different degrees of visual impairment, with 30 tumoral relapses, of which 10 received radiotherapy. 40 adenomas produced prolactin, although only 29 patients developed clinical signs of hyperprolactinemia; 38 tumors contained growth hormone, of which only 25 had acromegaly; 8 tumors contained ACTH in the cytoplasm, although only 7 developed Cushing's Syndrome and 57 patients (47.5%) were classified as nonfunctional and did not show any endocrinological data. All the cases are studied with a light microscope, electron microscope, and they were all submitted to a complete set of adenohypophyseal hormone with immunoperoxidase technique. PMID:1302734

Félix, I A; Rodríguez Mendoza, L; Guinto, G; Torres Corzo, J; Wussterhaus, C A

1992-01-01

403

Final report on EURAMET.AUV.A-S1  

NASA Astrophysics Data System (ADS)

The supplementary Regional Comparison EURAMET.AUV.A-S1 has been carried out under the auspices of EURAMET's Technical Committee for Acoustics, Ultrasound and Vibration, and the Consultative Committee for Acoustics, Ultrasound and Vibration (CCAUV) of the International Bureau of Weights and Measures (BIPM). The participating NMIs are the Centro Nacional de Metrología (CENAM, Mexico), the Danish Fundamental Metrology (DFM, Denmark) and the Directorate of Measures and Precious Metals (DMDM, Serbia). The role of the Pilot laboratory was jointly undertaken by the DFM and CENAM. The time schedule was organized in a single star configuration. Two LS1P microphones and two LS2aP were circulated among participants. This report includes the measurement results from the participants, and the analysis leading to a proposal for the reference values for the comparison. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCAUV, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Barrera-Figueroa, Salvador; Nielsen, Lars

2013-01-01

404

Intestinal parasites in a quilombola community of the Northern State of Espírito Santo, Brazil.  

PubMed

The aim of this study was to determine the occurrence of intestinal parasites in a quilombola community from the northern Espírito Santo, Brazil. Descendants of slaves who arrived in Brazil in the sixteenth century, this population settled in the municipality of São Mateus in 1858. Fresh fecal samples from 82 individuals who agreed to participate in the study were collected between August 2009 and July 2010, and immediately sent to the Clinical Laboratory of the Centro Universitário Norte do Espírito Santo of the Universidade Federal do Espírito Santo for analysis. Out of all the participants, 36 (43.9%) were male and 46 (56.1%) were female, whose ages ranged from six to 85 years. The study of the occurrence of intestinal parasites indicated that 35 individuals (42.7%) were infected with at least one intestinal parasite. Among helminths, the most frequent were hookworms, with a rate of 14.6%. With regard to protozoa, Entamoeba coli, Entamoeba histolytica/Entamoeba dispar and Endolimax nana stood out, with frequencies of 23.2%, 8.5% and 4.9%, respectively. The occurrence of biparasitism was observed in 13 of the 82 subjects, accounting for 15.8%, and no cases of multiple parasitic infections were observed. It was concluded that the reduction of cases of intestinal diseases due to parasites will only be achieved with the improvement of basic sanitation and quality of life of quilombola populations. PMID:23740008

Damazio, Schayra Minine; Lima, Marcela de Souza; Soares, Aparecida Rios; Souza, Marco Antônio Andrade de

2013-01-01

405

The lost honour of Henrietta Leavitt  

NASA Astrophysics Data System (ADS)

The first scene opens with the music of Shirley Bassey. The astronomer Henrietta Swan Leavitt is writing a diary when visited by the famous CBS reporter Edward Roscoe Murrow. Henrietta is surprised that this American television channel should want to pay such a tribute to her, but she agrees to be interviewed. Annie Jump Cannon, her friend and colleague from Harvard College Observatory, accompanies her during most of the sessions. Everything goes so well that the journalist tries to touch on certain issues that Henrietta seems to want to keep secret, such as her relationship with Edward Charles Pickering, Director of the Observatory, and the reason why she failed to get the recognition for her work that she deserved.This is the argument of the play The Lost Honor of Henrietta Leavitt, a project of the Museo de la Ciencia y el Cosmos (Museum of Science and the Cosmos), run by the Organismo Autonomo de Museos y Centros of Cabildo de Tenerife (Autonomous Organism of Museums and Centres of the island government, Cabildo of Tenerife), with funding from the Spanish Foundation for Science and Technology (FECYT) and designed for the International Year of Astronomy 2009. The play, written and directed by the author, Carmen del Puerto, has been staged eight times in Tenerife and Pamplona. The poster values this experience as a resource for scientific popularization.

Del Puerto, C.

2011-11-01

406

Correction and Validation of Total Ozone Data Series From An Antarctic Multichannel Filter Radiometer Solar UV Network  

NASA Astrophysics Data System (ADS)

The Antarctic Network of the MAR-Project (Measurement of Antarctic Radiance for monitoring the ozone layer) is the result of a co-operation among the Instituto Nacional de Meteorología (INM, Spain), Instituto Nacional de Técnica Aeroespacial (INTA, Spain), the Instituto Antártico Argentino - Dirección Nacional del Antártico (IAA/DNA), the Finnish Meteorological Institute (FMI), and the Centro Austral de Investigaciones Científicas (CADIC, Argentina). This network consists on three NILU-UV6 multichannel filter radiometers installed at the Argentinean Antarctic bases of Vicecomodoro Marambio and Belgrano II, and at the CADIC in Ushuaia, respectively. These instruments measure at five UV channels (305, 3120, 320, 340 and 380 nm) and PAR (400 - 700 nm). Quality control and quality assurance systems of the network give us information for irradiance correction. Quality control is based on the 2-week lamp tests performed at each station, and provides quantitative information about the stability of each instrument. Quality assurance, which is performed twice a year by the FMI, lies in inter-comparisons between the travelling reference instrument and the station instruments. These intercomparisons provide calibration coefficients for each channel. Ozone can be derived from the NILU-UV6 instruments using the 305 nm / 320 nm ratio. Ozone data series before and after irradiance correction are compared against independent ozone measurements from the TOMS, the Dobson and the UV-VIS instruments at the Ushuaia station.

Torres, C.; Redondas, A.; Cuevas, E.; Lakkala, K.; Taalas, P.

407

Polymorphism analysis in genes of the somatotropic axis in Nellore cattle selected for growth.  

PubMed

The somatotropic axis consists of genes that are involved in muscular development. These genes are potential regions of study to identify possible QTL for economically important traits in beef cattle. The aim of this study was to verify the existence of GH1, POU1F1, and GHR polymorphisms in Nellore cattle to verify the influence of selection in these mutations and to analyse the association between molecular markers and body weight at different ages, yearling hip height, carcass fat thickness and loin eye area. Six hundred forty-five animals from the Centro APTA Bovinos de Corte, were genotyped by PCR-RFLP techniques. The association analyses were performed with general mixed models taking into consideration the effect of one marker, and other model taking into consideration interactions between two molecular markers. Only the molecular markers rs81109601 on GH1 and rs109136815 on GHR were polymorphic; however, they were not found to be under selection. The association of the GHR rs109136815 marker and loin eye area was observed (p<0.05), as well as the effect of interaction between the markers and the female body weight at 550 days of age (p<0.04). The interaction effect should be considered in situations where the interactivity between two genes is known. PMID:24835309

Cardoso, Diercles Francisco; de Souza, Fábio Ricardo Pablos; de Camargo, Gregório Miguel Ferreira; Fonseca, Patrícia Dias da Silva; Fonseca, Larissa Fernanda Simielli; Braz, Camila Urbano; Boligon, Arione Augusti; Mercadante, Maria Eugênia Zerlotti; de Albuquerque, Lucia Galvão; Tonhati, Humberto

2014-07-25

408

Science and technology disclosure in the state of Queretaro: Science and Technology for Children program  

NASA Astrophysics Data System (ADS)

Science and technology disclosure is an integral part of our scientific work as researches; it is an induction process for children, young people and teachers of primary and secondary schools in the state of Queretaro. Education must be offered in a clear and objective way, it allows to the students apply the acquired knowledge to understand the world and improve his quality of life. Nowadays, the Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada of the Instituto Politecnico Nacional Unidad Queretaro (CICATA-IPN Queretaro) together with the Consejo de Ciencia y Tecnologia del Estado de Queretaro (CONCYTEQ) have implemented the "Science and Technology for Children" program (Ciencia y Tecnologia para Ninos - CTN), it allows to the educative sector obtain information through the CONCYTEQ web page. The fist stage of the program was the development of two subjects: the brochure titled "Petroleum, Nonrenewable Natural Resource that Moves the World" and the manual "Experiments of Physics". At the moment we are working with the second stage of the program, it is about the energy generation using renewable sources such as: geothermal, aeolian, solar and biomass. The CTN program allows to students and teachers to create conscience about the importance of the development of the science of technology in our country.

Contreras Flores, Rubén; Villeda Muñoz, Gabriel

2007-06-01

409

Single pulse TMS-induced modulations of resting brain neurodynamics encoded in EEG phase.  

PubMed

Integration of electroencephalographic (EEG) recordings and transcranial magnetic stimulation (TMS) provides a useful framework for quantifying stimulation-induced modulations of neural dynamics. Amplitude and frequency modulations by different TMS protocols have been previously investigated, but the study of stimulation-induced effects on EEG phase has been more limited. We examined changes in resting brain dynamics following single TMS pulses, focusing on measures in the phase domain, to assess their sensitivity to stimulation effects. We observed a significant, approximately global increase in EEG relative phase following prolonged (>20 min) single-pulse TMS. In addition, we estimated higher rates of phase fluctuation from the slope of estimated phase curves, and higher numbers of phase resetting intervals following TMS over motor cortex, particularly in frontal and centro-parietal/parietal channels. Phase changes were only significantly different from their pre-TMS values at the end of the stimulation session, which suggests that prolonged single-pulse TMS may result in cumulative changes in neural activity reflected in the phase of the EEG. This is a novel result, as prior studies have reported only transient stimulation-related effects in the amplitude and frequency domains following single-pulse TMS. PMID:21203817

Stamoulis, Catherine; Oberman, Lindsay M; Praeg, Elke; Bashir, Shahid; Pascual-Leone, Alvaro

2011-06-01

410

KEY COMPARISON Final report on the key comparison CCAUV.A-K4  

NASA Astrophysics Data System (ADS)

The Key Comparison CCAUV.A-K4 has been carried out under the auspices of the Consultative Committee for Acoustics, Ultrasound and Vibration (CCAUV) of the International Bureau of Weights and Measures (BIPM). The participating NMIs are the Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial (INMETRO, Brazil), the Centro Nacional de Metrología (CENAM, Mexico), the Laboratoire National de Métrologie et d'Essais (LNE, France), the National Metrology Institute of Japan (NMIJ, Japan), the Korea Research Institute of Standards and Science (KRISS, Korea) and the Physikalisch-Technische Bundesanstalt (PTB, Germany). The role of the Pilot laboratory was undertaken by the DFM and CENAM. The measurements took place between January 2007 and February 2008. The time schedule was organized in a single star configuration. Two LS2aP microphones were circulated. This report includes the measurement results from the participants, information about their calibration methods, and the analysis leading to the assignation of the degrees of equivalence. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCAUV, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).

Barrera-Figueroa, Salvador; Nielsen, Lars; Rasmussen, Knud; Pérez Matzumoto, Andrés E.; Noé Razo Razo, José

2010-01-01

411

Memory for fearful faces across development: specialization of amygdala nuclei and medial temporal lobe structures  

PubMed Central

Enhanced memory for emotional faces is a significant component of adaptive social interactions, but little is known on its neural developmental correlates. We explored the role of amygdaloid complex (AC) and medial temporal lobe (MTL) in emotional memory recognition across development, by comparing fMRI activations of successful memory encoding of fearful and neutral faces in children (n = 12; 8–12 years) and adolescents (n = 12; 13–17 years). Memory for fearful faces was enhanced compared with neutral ones in adolescents, as opposed to children. In adolescents, activations associated with successful encoding of fearful faces were centered on baso-lateral AC nuclei, hippocampus, enthorhinal and parahippocampal cortices. In children, successful encoding of fearful faces relied on activations of centro-mesial AC nuclei, which was not accompanied by functional activation of MTL memory structures. Successful encoding of neutral faces depended on activations in anterior MTL region (hippocampal head and body) in adolescents, but more posterior ones (hippocampal tail and parahippocampal cortex) in children. In conclusion, two distinct functional specializations emerge from childhood to adolescence and result in the enhancement of memory for these particular stimuli: the specialization of baso-lateral AC nuclei, which is associated with the expertise in processing emotional facial expression, and which is intimately related to the specialization of MTL memory network. How the interplay between specialization of AC nuclei and of MTL memory structures is fundamental for the edification of social interactions remains to be elucidated.

Pinabiaux, Charlotte; Hertz-Pannier, Lucie; Chiron, Catherine; Rodrigo, Sebastian; Jambaque, Isabelle; Noulhiane, Marion

2013-01-01

412

[Ichthyofauna of the Navidad Bay, Jalisco, México].  

PubMed

A check-list and the relative abundance of the ichthyofauna from Bahia de Navidad, Jalisco, Mexico is presented. This poorly known area of the eastern Tropical Pacific ocean is characterized by its great fish diversity. A total of 245 fish species (163 genera, 72 families) were collected during the 1994-1995 annual cycle. Vouchers were deposited in Centro de Ecologia Costera, Universidad de Guadalajara. The most important families in number of species were Carangidae (20 species), Haemulidae (20), Serranidae (17), Sciaenidae (13) and Lutjanidae (8); 20 species represented 85% and 80% of relative abundance and biomass respectively. Microlepidotus brevipinnis, Caranx caninus, Caranx caballus, Kiphosus analogus and Caranx sexfasciatus, were the dominant species. Most fish species collected in Bahia de Navidad have zoogeographical affinity with the Panamic Province (65%), and in lesser proportion with the Eastern Pacific Ocean (19%), Circumtropical (7%), Mexican Province (5%), Indo-Pacific Ocean (3%) and Gulf of California (0.4%). The great ichthyological affinity between the study area and the southern Gulf of California suggests an extension of the of Gulf southern limit. PMID:11795146

Aguilar-Palomino, B; Pérez Reyes, C; Galván-Magaña, F; Abitía-Cardenas, L A

2001-03-01

413

Prospects for malaria elimination in non-Amazonian regions of Latin America.  

PubMed

Latin America contributes 1-1.2 million clinical malaria cases to the global malaria burden of about 300 million per year. In 21 malaria endemic countries, the population at risk in this region represents less than 10% of the total population exposed worldwide. Factors such as rapid deforestation, inadequate agricultural practices, climate change, political instability, and both increasing parasite drug resistance and vector resistance to insecticides contribute to malaria transmission. Recently, several malaria endemic countries have experienced a significant reduction in numbers of malaria cases. This is most likely due to actions taken by National Malaria Control Programs (NMCP) with the support from international funding agencies. We describe here the research strategies and activities to be undertaken by the Centro Latino Americano de Investigación en Malaria (CLAIM), a new research center established for the non-Amazonian region of Latin America by the National Institute of Allergy and Infectious Diseases (NIAID). Throughout a network of countries in the region, initially including Colombia, Guatemala, Panama, and Peru, CLAIM will address major gaps in our understanding of changing malaria epidemiology, vector biology and control, and clinical malaria mainly due to Plasmodium vivax. In close partnership with NMCPs, CLAIM seeks to conduct research on how and why malaria is decreasing in many countries of the region as a basis for developing and implementing new strategies that will accelerate malaria elimination. PMID:21781953

Herrera, Sócrates; Quiñones, Martha Lucia; Quintero, Juan Pablo; Corredor, Vladimir; Fuller, Douglas O; Mateus, Julio Cesar; Calzada, Jose E; Gutierrez, Juan B; Llanos, Alejandro; Soto, Edison; Menendez, Clara; Wu, Yimin; Alonso, Pedro; Carrasquilla, Gabriel; Galinski, Mary; Beier, John C; Arévalo-Herrera, Myriam

2012-03-01

414

Prospects for malaria elimination in non-Amazonian regions of Latin America  

PubMed Central

Latin America contributes 1 to 1.2 million clinical malaria cases to the global malaria burden of about 300 million per year. In 21 malaria endemic countries, the population at risk in this region represents less than 10% of the total population exposed worldwide. Factors such as rapid deforestation, inadequate agricultural practices, climate change, political instability, and both increasing parasite drug resistance and vector resistance to insecticides contribute to malaria transmission. Recently, several malaria endemic countries have experienced a significant reduction in numbers of malaria cases. This is most likely due to actions taken by National Malaria Control Programs (NMCP) with the support from international funding agencies. We describe here the research strategies and activities to be undertaken by the Centro Latino Americano de Investigación en Malaria (CLAIM), a new research center established for the non-Amazonian region of Latin America by the National Institute of Allergy and Infectious Diseases (NIAID). Throughout a network of countries in the region, initially including Colombia, Guatemala, Panama, and Peru, CLAIM will address major gaps in our understanding of changing malaria epidemiology, vector biology and control, and clinical malaria mainly due to Plasmodium vivax. In close partnership with NMCPs, CLAIM seeks to conduct research on how and why malaria is decreasing in many countries of the region as a basis for developing and implementing new strategies that will accelerate malaria elimination.

Herrera, Socrates; Quinones, Martha Lucia; Quintero, Juan Pablo; Corredor, Vladimir; Fuller, Douglas O.; Mateus, Julio Cesar; Calzada, Jose E.; Gutierrez, Juan B.; Llanos, Alejandro; Soto, Edison; Menendez, Clara; Wu, Yimin; Alonso, Pedro; Carrasquilla, Gabriel; Galinski, Mary; Beier, John C.; Arevalo-Herrera, Myriam

2011-01-01

415

ERPs reveal individual differences in morphosyntactic processing.  

PubMed

We investigated individual differences in the neural substrates of morphosyntactic processing among monolingual English speakers using event-related potentials (ERPs). Although grand-mean analysis showed a biphasic LAN-P600 pattern to grammatical violations, analysis of individuals? ERP responses showed that brain responses varied systematically along a continuum between negativity- and positivity-dominant ERP responses across individuals. Moreover, the left hemisphere topography of the negativity resulted from component overlap between a centro-parietal N400 in some individuals and a right hemisphere-dominant P600 in others. Our results show that biphasic ERP waveforms do not always reflect separable processing stages within individuals, and moreover, that the LAN can be a variant of the N400. These results show that there are multiple neurocognitive routes to successful grammatical comprehension in language users across the proficiency spectrum. Our results underscore that understanding and quantifying individual differences can provide an important source of evidence about language processing in the general population. PMID:24530237

Tanner, Darren; Van Hell, Janet G

2014-04-01

416

Multitemporal analysis of PAL images for the study of land cover dynamics in South America  

NASA Astrophysics Data System (ADS)

Pathfinder AVHHR Land (PAL) database has been used for the retrieval of Land Surface Temperature (LST) over South America, which, along with NDVI parameter, will allow the studying of the evolution of the vegetation between July 1981 and September 2001. To this end, a classification has been built, based on PAL NDVI and Reanalysis air temperature at 2 m height data. This classification takes into account both vegetation and thermal patterns, and has been validated by a comparison with CAZALAC's map of arid zones (Centro del Agua para Zonas Áridas y semiáridas de Latino-América y el Caribe), as well as with Global Land Cover Characteristics' classification built by the USGS (United States Geological Survey). The principal advantage of this new classification is that it is a dynamic classification, that considers the actual state of the cover, since no assumption on land occupation is made for its construction. LST and NDVI yearly and long-term evolutions are analyzed with the help of this classification. Yearly evolutions are compared with Reanalysis air temperature at 2 m height and precipitation, and show good concordance. LST long-term evolution shows to be strongly affected by satellite changes and orbital drift. These latter require an adequate correction to allow deeper study. On the other hand, NDVI does not show this trend, but aerosol absorption from Mount Pinatubo's eruption in June 1991 corrupts temporarily the data. These results also validate the above-mentioned classification.

Sobrino, J. A.; Julien, Y.; Morales, L.

2006-06-01

417

Multigap Resistive Plate Chambers for EAS study in the EEE Project  

NASA Astrophysics Data System (ADS)

The EEE (Extreme Energy Event) Project is an extensive air shower experiment devoted to the study of very high energy events through the detection at ground of the muon component of the shower. The detectors are installed inside many Italian High Schools, involving students in the experiment. The detector used is a tracking telescope made of 3 planes of Multi-gap Resistive Plate Chambers (MRPCs), a simplified, large and cheap version of the detector designed for the time of flight measurements (TOF) of the ALICE experiment at LHC. Exploiting the concept of the multiple small gas gaps combined with the use of high gain and fast gas mixture (Freon and SF6 based), the MRPCs show an overall time resolution of 100 ps. The particle tracking is performed equipping MRPCs with 24 copper strips read at both ends by front end electronics based on NINO ASIC and using commercial multi-hit TDCs. The MRPCs for the EEE experiment are built at CERN by Italian High School students and teachers under the supervision of INFN and Centro “E. Fermi” experts. After construction they are shipped to Italy and after preliminary tests they are installed inside the schools. Here we present the status and first results of the already operating stations.

Abbrescia, M.; An, S.; Antolini, R.; et al.

418

Dopamine Inactivation Efficacy Related to Functional DAT1 and COMT Variants Influences Motor Response Evaluation  

PubMed Central

Background Dopamine plays an important role in orienting, response anticipation and movement evaluation. Thus, we examined the influence of functional variants related to dopamine inactivation in the dopamine transporter (DAT1) and catechol-O-methyltransferase genes (COMT) on the time-course of motor processing in a contingent negative variation (CNV) task. Methods 64-channel EEG recordings were obtained from 195 healthy adolescents of a community-based sample during a continuous performance task (A-X version). Early and late CNV as well as motor postimperative negative variation were assessed. Adolescents were genotyped for the COMT Val158Met and two DAT1 polymorphisms (variable number tandem repeats in the 3?-untranslated region and in intron 8). Results The results revealed a significant interaction between COMT and DAT1, indicating that COMT exerted stronger effects on lateralized motor post-processing (centro-parietal motor postimperative negative variation) in homozygous carriers of a DAT1 haplotype increasing DAT1 expression. Source analysis showed that the time interval 500–1000 ms after the motor response was specifically affected in contrast to preceding movement anticipation and programming stages, which were not altered. Conclusions Motor slow negative waves allow the genomic imaging of dopamine inactivation effects on cortical motor post-processing during response evaluation. This is the first report to point towards epistatic effects in the motor system during response evaluation, i.e. during the post-processing of an already executed movement rather than during movement programming.

Bender, Stephan; Rellum, Thomas; Freitag, Christine; Resch, Franz; Rietschel, Marcella; Treutlein, Jens; Jennen-Steinmetz, Christine; Brandeis, Daniel; Banaschewski, Tobias; Laucht, Manfred

2012-01-01

419

Organic non-linear optics and opto-electronics  

NASA Astrophysics Data System (ADS)

?-conjugated organic molecules and polymers are of great importance in physics, chemistry, material science and engineering. It is expected that, in the near future, organic materials will find widespread use in many technological applications. In the case of organic opto-electronic systems, the list of devices includes light emitting diodes (OLEDs), photovoltaic cells (OPVs), field-effect transistors (OFET), photorefractive materials for light manipulation, among others. These materials are also used for photonic applications: all-optical switching, modulators, optical correlators, plastic waveguides, all polymeric integrated circuits, solid-state lasers, and for biophotonic applications as in the case of the development of organic labels for multiphoton microscopy and photodynamic therapy. The advances in the developing of organic compounds with better mechanical, electrical, and optical (linear and non-linear) characteristics are of a great importance for this field. Here, we present the research on this area carried out at the Centro de Investigaciones en Óp-tica (CIO), in collaboration with Chemistry Departments of different institutions. This work focuses on the optical characterization of materials through several techniques such as TOF, FWM, TBC, THG Maker Fringes, HRS, Z-scan, and TPEF. Additionally, some applications, such as dynamic holography by using photorefractive polymers, and OPVs cells will be discussed.

Maldonado, J. L.; Ramos-Ortíz, G.; Rodríguez, M.; Meneses-Nava, M. A.; Barbosa-García, O.; Santillán, R.; Farfán, N.

2010-12-01

420

Supercapacitors for the energy management of electric vehicles  

NASA Astrophysics Data System (ADS)

The integration of the on-board energy source of an electrically propelled vehicle with a supercapacitor bank (SB) as a peak power unit, can lead to substantial benefits in terms of electric vehicle performances, battery life and energy economy. Different architectures may be envisaged, to be chosen according to technical-economical trade-off. A research activity, supported by the European Community in the frame of the Joule III program and titled `Development of Supercapacitors for Electric Vehicles' (contract JOE3-CT95-0001), has been in progress since the beginning of 1996. The partners involved are SAFT (project leader), Alcatel Alsthom Research (France), Centro Ricerche Fiat (Italy), University of Kaiserslautern (Germany), Danionics (DK) and ECN (Netherlands). Its objective is to develop a SB and its electronic control and to integrate them in two different full-scale traction systems, supplied, respectively, by sealed lead traction batteries and by a fuel cell system. Through the bench tests, it will be possible to evaluate the impact of the SB on both traction systems. In this paper, a project overview will be given; the power management strategy principles, the supercapacitor's control electronic devices, the system's architecture and the supercapacitor's requirements on the base of the simulation results, will be examined.

Faggioli, Eugenio; Rena, Piergeorgio; Danel, Veronique; Andrieu, X.; Mallant, Ronald; Kahlen, Hans

421

The concept of inner cerebral trauma.  

PubMed

The pattern of "inner cerebral trauma" is a morphological and functional-pathological correlate of biomechanical conditions at the event of severe closed craniocerebral injury of acceleration-type, if the traumatizing forces act in the direction of the longest diameter of the skull. The lesions are characteristically localized in the "centro-axial" regions of the brain involving most frequently: corpus callosum, septum pellucidum, fornix, tela chorioidea, peri- and para-ventricular zone, infundibulobasal region and cingulum; this pattern also includes lesions of the hippocampal area, upper brainstem, pontocerebellar complex, and parasagittal areas of the cerebrum. This pattern includes lesions, which are from the onset "primary irreversible" as well as "primary reversible" lesions, which spread apart from the "epicentres" of the primary irreversible damage and are in principle more diffuse but still within the basic pattern of the main predilection. This is the basis of the process of "traumatic cerebral disease". The final size and scope of the pathological process of the "traumatic cerebral disease" depend on a number of secondary factors, which may allow the normal process of healing to keep the tissue changes within the initial scope of "primary irreversible damage", or may enhance a progressive process of turning the "reversible" traumatic damage into the irreversible lesions. PMID:3041565

Grcevi?, N

1988-01-01

422

Frequencies of inaudible high-frequency sounds differentially affect brain activity: positive and negative hypersonic effects.  

PubMed

The hypersonic effect is a phenomenon in which sounds containing significant quantities of non-stationary high-frequency components (HFCs) above the human audible range (max. 20 kHz) activate the midbrain and diencephalon and evoke various physiological, psychological and behavioral responses. Yet important issues remain unverified, especially the relationship existing between the frequency of HFCs and the emergence of the hypersonic effect. In this study, to investigate the relationship between the hypersonic effect and HFC frequencies, we divided an HFC (above 16 kHz) of recorded gamelan music into 12 band components and applied them to subjects along with an audible component (below 16 kHz) to observe changes in the alpha2 frequency component (10-13 Hz) of spontaneous EEGs measured from centro-parieto-occipital regions (Alpha-2 EEG), which we previously reported as an index of the hypersonic effect. Our results showed reciprocal directional changes in Alpha-2 EEGs depending on the frequency of the HFCs presented with audible low-frequency component (LFC). When an HFC above approximately 32 kHz was applied, Alpha-2 EEG increased significantly compared to when only audible sound was applied (positive hypersonic effect), while, when an HFC below approximately 32 kHz was applied, the Alpha-2 EEG decreased (negative hypersonic effect). These findings suggest that the emergence of the hypersonic effect depends on the frequencies of inaudible HFC. PMID:24788141

Fukushima, Ariko; Yagi, Reiko; Kawai, Norie; Honda, Manabu; Nishina, Emi; Oohashi, Tsutomu

2014-01-01

423

[Cotyledonoid dissecting leiomyoma of the uterus. A malignant-looking benign tumor].  

PubMed

The cotyledonoid dissecting leiomyoma of the uterus, or Stenberg tumor, is a rare variant of a smooth muscle benign tumor, classified in the group presenting an unusual growth pattern; clinically, it affects women in reproductive age. We report the case of a 43 year-old woman, who turned up at the Centro Estatal de Atencion Oncologica (State Cancer Care Center) in Morelia, Michoacan, presenting abnormal uterine bleeding and uterine fibroid of major elements. When performing a palpatory bimanual exam, a loose uterus of approximately 7 by 6 inches was identified; it ached when moving. The laboratory tests reported normal parametriums; the ultrasound showed, however, uterine fibroids of major elements. The uterus was enlarged due to a tumor of exophytic growth, which resembles placental cotyledons extended over the uterine surface, composed by smooth muscle nodules that dissected the uterine wall, and with infiltrative appearance in parametriums and the myometrial wall. Despite this microscopic aggressive appearance, a number of ultrastructuctural studies and immunohistochemical techniques proved its benign nature. This can help patients who want to preserve fertility avoid radical surgery. PMID:23088072

Chávez Martínez, Sareni; Arias González, María Leilanie; Silva López, Rosa María; Villagrán Uribe, Jesús Angel

2012-08-01

424

ERP correlates of German Sign Language processing in deaf native signers  

PubMed Central

Background The present study investigated the neural correlates of sign language processing of Deaf people who had learned German Sign Language (Deutsche Gebärdensprache, DGS) from their Deaf parents as their first language. Correct and incorrect signed sentences were presented sign by sign on a computer screen. At the end of each sentence the participants had to judge whether or not the sentence was an appropriate DGS sentence. Two types of violations were introduced: (1) semantically incorrect sentences containing a selectional restriction violation (implausible object); (2) morphosyntactically incorrect sentences containing a verb that was incorrectly inflected (i.e., incorrect direction of movement). Event-related brain potentials (ERPs) were recorded from 74 scalp electrodes. Results Semantic violations (implausible signs) elicited an N400 effect followed by a positivity. Sentences with a morphosyntactic violation (verb agreement violation) elicited a negativity followed by a broad centro-parietal positivity. Conclusions ERP correlates of semantic and morphosyntactic aspects of DGS clearly differed from each other and showed a number of similarities with those observed in other signed and oral languages. These data suggest a similar functional organization of signed and oral languages despite the visual-spacial modality of sign language.

2014-01-01

425

Monochromator-Based Absolute Calibration of a Standard Radiation Thermometer  

NASA Astrophysics Data System (ADS)

Centro Español de Metrología (CEM) is disseminating the International Temperature Scale (ITS-90), at high temperatures, by using the fixed points of Ag and Cu and a standard radiation thermometer. However, the future mise-en-pratique for the definition of the kelvin (MeP-K) will include the dissemination of the kelvin by primary methods and by indirect approximations capable of exceptionally low uncertainties or increased reliability. Primary radiometry is, at present, able to achieve uncertainties competitive with the ITS-90 above the silver point with one of the possible techniques the calibration for radiance responsivity of an imaging radiometer (radiance method). In order to carry out this calibration, IO-CSIC (Spanish Designated Institute for luminous intensity and luminous flux) has collaborated with CEM, allowing traceability to its cryogenic radiometer. A monochromator integrating sphere-based spectral comparator facility has been used to calibrate one of the CEM standard radiation thermometers. The absolute calibrated standard radiation thermometer has been used to determine the temperatures of the fixed points of Cu, Co-C, Pt-C, and Re-C. The results obtained are 1357.80 K, 1597.10 K, 2011.66 K, and 2747.64 K, respectively, with uncertainties ranging from 0.4 K to 1.1 K.

Mantilla, J. M.; Hernanz, M. L.; Campos, J.; Martín, M. J.; Pons, A.; del Campo, D.

2014-04-01

426

The guava tree as bioindicator during the process of fuel replacement of an oil refinery.  

PubMed

This study was performed to verify whether the exchange of the fuel used in the boilers of a crude oil refinery located in Cubatão (SE Brazil) would result in alterations on gas exchange, growth and leaf injuries in saplings of Psidium guajava 'Paluma'. The purpose of the refinery was to reduce the SO2 emission, but using natural gas as fuel could increase the concentrations of O3 precursors in the atmosphere. Thus a biomonitoring was performed with a native species sensitive to O3. The plants were exposed in five areas (CM1, CM5, CEPEMA, Centro, and RP) at different distances to the refinery, both before and after the fuel exchange. We performed six exposures under environmental conditions, with length of ca. 90 days each. With the utilization of natural gas, the saplings presented reductions in carbon assimilation rate under saturating light conditions (Asat, ?molCO2m(-2)s(-1)) and the stomatal conductance (gs, molH2Om(-2)s(-1)), and increase in height, number of leaves, and dry mass of leaves and shoots. There were also reductions in root dry mass and in the root/shoot ratio. The saplings also presented O3-induced leaf injuries. The responses of P. guajava 'Paluma' were altered after the fuel exchange as a result of a new combination of pollutants in the atmosphere. The fuel exchange has not resulted in environmental benefit to the surrounding forest; it has only altered the contamination profile of the region. PMID:23391563

Silva, Simone F; Meirelles, Sérgio T; Moraes, Regina M

2013-05-01

427

The Next Generation of Interoperability Agents in Healthcare  

PubMed Central

Interoperability in health information systems is increasingly a requirement rather than an option. Standards and technologies, such as multi-agent systems, have proven to be powerful tools in interoperability issues. In the last few years, the authors have worked on developing the Agency for Integration, Diffusion and Archive of Medical Information (AIDA), which is an intelligent, agent-based platform to ensure interoperability in healthcare units. It is increasingly important to ensure the high availability and reliability of systems. The functions provided by the systems that treat interoperability cannot fail. This paper shows the importance of monitoring and controlling intelligent agents as a tool to anticipate problems in health information systems. The interaction between humans and agents through an interface that allows the user to create new agents easily and to monitor their activities in real time is also an important feature, as health systems evolve by adopting more features and solving new problems. A module was installed in Centro Hospitalar do Porto, increasing the functionality and the overall usability of AIDA.

Cardoso, Luciana; Marins, Fernando; Portela, Filipe; Santos, Manuel; Abelha, Antonio; Machado, Jose

2014-01-01

428

Solar central receiver reformer system for ammonia plants  

NASA Astrophysics Data System (ADS)

Details of the conceptual design, economic analysis, and development plan for a solar central receiver system for retrofitting the Valley Nitrogen Producers, Inc., El Centro, California 600 ST/SD Ammonia Plant are presented. The retrofit system consists of a solar central receiver reformer (SCRR) operating in parallel with the existing fossil fired reformer. Steam and hydrocarbon react in the catalyst filled tubes of the inner cavity receiver to form a hydrogen rich mixture which is the syngas feed for the ammonia production. The SCRR system displaces natural gas presently used in the fossil reformer combustion chamber. The solar reformer retrofit system characteristics and its interface with the existing plant are simple, incorporating state of the art components with proven technology. A northfield composed of one thousand forty second generation heliostats provides solar energy to the receiver which is positioned on top of a 90 meter high steel tower. The overall economics of this system can provide over 20% discount cash flow rate of return with proper investment and market conditions.

1980-07-01

429

EEG amplitude spectra before near threshold visual presentations differentially predict detection/omission and short-long reaction time outcomes.  

PubMed

Performance in simple stimulus detection manifests as both probability of detection and speed of signaling detected stimuli. These two dimensions of performance across trials were examined with respect to brain states just prior to stimulus delivery, using near threshold stimuli targeting the magnocellular or the parvocellular visual streams in an attempt to isolate differential perceptual preparation. The EEG amplitude of 12 university students was analyzed in spectral bands from 2 to 50 Hz at 9 bilateral channel pairs in a window covering -450 ms to +50 ms relative to stimulus onset. A hierarchical statistical procedure was applied to control false positive results. EEG power in the 2, 4, 8 and 10 Hz bands was found significantly lower at the F7-F8 channel pair both before detected compared to omitted stimuli and before the fastest compared to slowest reaction time quartiles, with no stimulus type effect. In addition, the 22 and 24 Hz band activity was lower prior to better performance frontally (F3-F4, F7-F8) in reaction time but not in detection, while it was larger centro-parietally (CP1-CP2, P3-P4) in detection but not in reaction times. Spectral analysis thus shows stimulus detection and response speed to depend partly on common and partly on distinct pre-stimulus brain states. PMID:23747426

Achim, André; Bouchard, Julie; Braun, Claude M J

2013-07-01

430

Analysis of Standards and Specific Documentation about Equipment of Dimensional Metrology  

NASA Astrophysics Data System (ADS)

Currently the certification of quality systems and accreditation of laboratories for metrology and testing are activities of great interest within the framework of advanced production systems. In this context, the availability of standardized documents, complete and efficient as well as specific documents edited by agencies with experience in this field, is especially important to obtain better results and lower costs. This work tries to establish the foundations to evaluate a documental system about equipment of Dimensional Metrology. An integrated and complete system does not exist in international field, so the Spanish case will be analyzed as example to the general study. In this paper we consider three types of instruments commonly used in the field of Dimensional Metrology (vernier calliper, micrometer calliper and mechanical dial gauge) and are passed to analyze the contents of UNE standards that affect them directly, and the two collections of documents produced and edited by the Centro Espan~ol de Metrología (CEM), such as ``calibration procedures'' and ``use manuals.'' Given the results of this analysis, a discussion on the metrological characteristics of the contents of the document in question is developed and recommendations for their use and improvement are proposed.

Martin, M. J.; Flores, I.; Sebastian, M. A.

2009-11-01

431

Neural events leading to and associated with detection of sounds under high processing load.  

PubMed

The neural events that lead to successful or failed detection of suprathreshold sounds are not well established. In this experiment, event-related potentials (ERPs) and functional magnetic resonance imaging (fMRI) were recorded while participants performed two tasks: a primary difficult duration judgment task on a sequence of tones presented to one ear, and a secondary target detection task on an auditory oddball stream presented to the other ear. The paradigm was designed to elicit competition and variability in detection of auditory targets despite identical input. Successful detection of auditory targets was associated mainly with greater fMRI activity in superior parietal cortex and thalamus. In the ERPs, successful detection was linked with a larger fronto-central negativity at 200-400 ms, and a later centro-posterior positivity. Failure to detect targets was associated with greater fMRI signal in the default mode network, a significantly smaller electrical fronto-central negativity and no late positivity. These findings demonstrate that variability in auditory detection is related to modulation of activity in multimodal parietal and frontal networks active ? 200 ms after target onset. Results are consistent with a limited capacity and late selection view of attention. PMID:22102362

Sabri, Merav; Humphries, Colin; Binder, Jeffrey R; Liebenthal, Einat

2013-03-01

432

The Establishment of an Operational Earthquake Forecasting System in Italy  

NASA Astrophysics Data System (ADS)

Just after the Mw 6.2 earthquake that hit L'Aquila, on April 6 2009, the Civil Protection nominated an International Commission on Earthquake Forecasting (ICEF) that paved the way to the development of the Operational Earthquake Forecasting (OEF), defined as the "procedures for gathering and disseminating authoritative information about the time dependence of seismic hazards to help communities prepare for potentially destructive earthquakes". In this paper we introduce the first official OEF system in Italy that has been developed by the new-born Centro di Pericolosità Sismica at the Istituto Nazionale di Geofisica e Vulcanologia. The system provides every day an update of the weekly probabilities of ground shaking over the whole Italian territory. In this presentation, we describe in detail the philosophy behind the system, the scientific details, and the output format that has been preliminary defined in agreement with Civil Protection. To our knowledge, this is the first operational system that fully satisfies the ICEF guidelines. Probably, the most sensitive issue is related to the communication of such a kind of message to the population. Acknowledging this inherent difficulty, in agreement with Civil Protection we are planning pilot tests to be carried out in few selected areas in Italy; the purpose of such tests is to check the effectiveness of the message and to receive feedbacks.

Marzocchi, Warner; Lombardi, Anna Maria; Casarotti, Emanuele

2014-05-01

433

Epidemiological study (2006-2012) on the poisoning of small animals by human and veterinary drugs.  

PubMed

A retrospective study was conducted on the exposure of dogs and cats to drugs, reported to the Poison Control Centre of Milan (Centro Antiveleni di Milano (CAV)) between January 2006 and December 2012. Calls related to drugs for human use and veterinary drugs accounted for 23.7 per cent of total inquiries (1415) received by CAV and mostly involved dogs (70 per cent of enquiries). Exposure to drugs for human use accounted for 79 per cent of cases involving dogs, whereas veterinary drugs were the main culprit (77 per cent) in the case of cats. The most common class of drugs for human use proved to be CNS drugs (26.8 per cent), followed by NSAIDs (19.6 per cent) and cardiovascular and endocrine drugs (12.9 per cent each). The majority of calls (95.2 per cent) related to veterinary drugs involved dogs and cats exposed to parasiticides. The outcome was reported in only 58.2 per cent of cases, and fatal poisoning accounted for 8.7 per cent of these cases. Epidemiological data from this Italian survey provide useful information on animal exposure to drugs. The knowledge of agents involved in poisoning episodes can help veterinarians make the correct diagnosis and institute preventive measures to possibly reduce animal exposure to drugs. PMID:24477472

Caloni, F; Cortinovis, C; Pizzo, F; Rivolta, M; Davanzo, F

2014-03-01

434

Melasma: treatment strategy.  

PubMed

Melasma, a hypermelanosis of the face, is a common skin problem of middle-aged women of all racial groups, especially with dark complexion. Its precise etio-pathogenesis is evasive, genetic influences, exposure to sunlight, pregnancy, oral contraceptives, estrogen-progesterone therapies, thyroid dysfunction, cosmetics, and drugs have been proposed. Centro-facial, malar, and mandibular are well-recognized. Epidermal pigmentation appears brown/black, while dermal is blue in color, and can be distinguished by Wood's lamp illumination. The difference may be inapparent with mixed type of melasma in skin types V and VI. An increase in melanin in epidermis: basal and suprabasal layers and/or dermis is the prime defect. There is an increased expression of tyrosinase related protein-1 involved in eumelanin synthesis. The use of broad-spectrum sunscreen is important, lightening agents like retinoic acid (tretinoin), azelaic acid, and combination therapies containing hydroquinone, tretinoin, and corticosteroids, have been used in the treatment of melasma, and are thought to have increased efficacy as compared with monotherapy. Quasi-drugs, placental extracts, ellagic acid, chamomilla extract, butylresorcinol, tranexamic acid, methoxy potassium salicylate, adenosine monophosphate disodium salt, dipropyl-biphenyl-2,2'-diol, (4-hydroxyphenyl)-2-butanol, and tranexamic acid cetyl ester hydrochloride, in addition to kojic and ascorbic acid have been used. Chemical peeling is a good adjunct. Laser treatment is worthwhile. PMID:21981383

Sehgal, Virendra N; Verma, Prashant; Srivastava, Govind; Aggarwal, Ashok K; Verma, Sangeeta

2011-12-01

435

Physicians down-regulate their pain empathy response: an event-related brain potential study.  

PubMed

Watching or imagining other people experiencing pain activates the central nervous system's pain matrix in the observer. Without emotion regulation skills, repeated exposure to the suffering of others in healthcare professionals may be associated with the adverse consequences of personal distress, burnout and compassion fatigue, which are detrimental to their wellbeing. Here, we recorded event-related potentials (ERP) from physicians and matched controls as they were presented with visual stimuli depicting body parts pricked by a needle (pain) or touched by a Q-tip (no-pain). The results showed early N110 differentiation between pain and no-pain over the frontal area as well as late P3 over the centro-parietal regions were observed in the control participants. In contrast, no such early and late ERP responses were detected in the physicians. Our results indicate that emotion regulation in physicians has very early effects, inhibiting the bottom-up processing of the perception of pain in others. It is suggested that physicians' down-regulation of the pain response dampens their negative arousal in response to the pain of others and thus may have many beneficial consequences including freeing up cognitive resources necessary for being of assistance. PMID:20080194

Decety, Jean; Yang, Chia-Yan; Cheng, Yawei

2010-05-01

436

The new Cyclone 18/9 beam transport line at the CNA (Sevilla) for high energy PIXE applications  

NASA Astrophysics Data System (ADS)

The Cyclone 18/9 cyclotron system at the Centro Nacional de Aceleradores (Sevilla, Spain) is commonly used to create short life radioisotopes for PET applications. Besides, an external beam transport line has been recently installed in one of the target ports with two major purposes: to study the effects of 18 MeV protons irradiation on the behaviour of electronic devices for space applications and to complement the analysis of materials using our 3 MV tandem accelerator with the PIXE measurements at high energy. In this work, the main elements of our beamline will be briefly described and the first PIXE application will be presented. The usual PIXE, in the analysis of archaeological metallic objects, using around 3 MeV protons requires having a shiny area. Our purpose is to obtain a deeper determination of the bulk composition bombarding with 18 MeV protons through the corroded samples surfaces, without polishing the ancient object. To check this methodology high energy PIXE has been performed on two fibulae of the Later Bronze Age and First Iron Age, coming from the area around Sevilla.

García López, J.; Ortega-Feliu, I.; Morilla, Y.; Ferrero, A.

2008-04-01

437

Repetition and brain potentials when recognizing natural scenes: task and emotion differences.  

PubMed

Repetition has long been known to facilitate memory performance, but its effects on event-related potentials (ERPs), measured as an index of recognition memory, are less well characterized. In Experiment 1, effects of both massed and distributed repetition on old-new ERPs were assessed during an immediate recognition test that followed incidental encoding of natural scenes that also varied in emotionality. Distributed repetition at encoding enhanced both memory performance and the amplitude of an old-new ERP difference over centro-parietal sensors. To assess whether these repetition effects reflect encoding or retrieval differences, the recognition task was replaced with passive viewing of old and new pictures in Experiment 2. In the absence of an explicit recognition task, ERPs were completely unaffected by repetition at encoding, and only emotional pictures prompted a modestly enhanced old-new difference. Taken together, the data suggest that repetition facilitates retrieval processes and that, in the absence of an explicit recognition task, differences in old-new ERPs are only apparent for affective cues. PMID:22842817

Ferrari, Vera; Bradley, Margaret M; Codispoti, Maurizio; Karlsson, Marie; Lang, Peter J

2013-12-01

438

The Effects of Land use on Soil Properties and Runoff Response at the CATIE Farm, Turrialba, Costa Rica.  

NASA Astrophysics Data System (ADS)

Runoff response in humid tropical areas often is assumed to occur due to infiltration excess. Rainfall intensities in these areas can be monstruous. However, at the Centro Agronómico Tropical de Investigación y Enseñanza (CATIE) farm near Turrialba in Costa Rica, we have observed that volcanically derived soils have very high infiltration capacities, depending on the land use type, suggesting that saturation excess overland flow mechanism are important in explaining the runoff response. In this study we compared field-scale (1-6 ha) runoff response of four different types of prominent land use on the CATIE farm: forest, a coffee agroforestry system, sugar cane, and pasture. The research site is located at approximately 650 masl in deep soils on the tropical wet Caribbean slope of Costa Rica. Hydrograph analysis of observed runoff data suggest that the runoff mechanism in forest, coffee and sugar cane sites depends much more on the amount of soil storage (e.g. saturated-excess overland flow) than in the pasture site. The pasture site exhibits more of an infiltration-excess response. In this presentation we present differences in several soil properties that correlate with land use. We simulated measured runoff responses using the Soil Moisture Routing (SMR) model in this high rainfall, deep soil environment because of its ability to simulate saturation-excess overland flow and lateral flows.

Toohey, R.; Brooks, E. S.; Jones, J.; Boll, J.

2006-12-01

439

Combining ability for yield and fruit quality in the pepper Capsicum annuum.  

PubMed

The objective of this study was to determine the effects of the general and specific combining abilities (GCA and SCA, respectively) of 15 characteristics and to evaluate the most promising crosses and the reciprocal effect between the hybrids of six parents of the Capsicum annuum species. Six parents, belonging to the Horticultural Germplasm Bank of Centro de Ciências Agrárias of Universidade Federal da Paraíba, were crossed in complete diallel manner. The 30 hybrids generated and the parents were then analyzed in a completely randomized design with three replicates. The data were submitted to analysis of variance at 1% probability, and the means were grouped by the Scott-Knott test at 1% probability. The diallel analysis was performed according to the Griffing method, model I and fixed model. Both additive and non-additive effects influenced the hybrids' performance, as indicated by the GCA/SCA ratio. The non-additive effects, epistasis and/or dominance, played a more important role than the additive effects in pedicel length, pericarp thickness, fresh matter, dry matter content, seed yield per fruit, fruit yield per plant, days to fructification, and total soluble solids. The GCA effects were more important than the SCA effects in the fruit weight, fruit length and diameter, placenta length, yield, vitamin C, and titratable acidity characteristics. The results found here clearly show that ornamental pepper varieties can be developed through hybridization in breeding programs with C. annuum. PMID:24841656

do Nascimento, N F F; do Rêgo, E R; Nascimento, M F; Bruckner, C H; Finger, F L; do Rêgo, M M

2014-01-01

440

[User satisfaction and responsiveness in the healthcare services at Fundação Oswaldo Cruz].  

PubMed

The paper discusses the results of research into user satisfaction in three healthcare facilities at Oswaldo Cruz Foundation in Rio de Janeiro. The analysis is based on the concepts of user satisfaction and responsiveness. Perceptions and opinions of outpatients from Instituto de Pesquisa Evandro Chagas, Instituto Fernandes Figueira and Centro de Saúde Escola Germano Sinval Faria were investigated. Intention samples were drawn for each institution and a total of 1.339 valid questionnaires were obtained. The study found that patients are satisfied with healthcare at Fiocruz, especially with health professionals. Nevertheless, restroom hygiene and privacy during consultations were less well evaluated. The improvement of these aspects depends not only on financial and technological investments but on changes in organizational culture. The first part of the paper discusses the literature on user satisfaction and responsiveness, with the definition of the categories that guided the study. The methodology is then presented as well as the four health services dimensions assessed - dignity, agility, facilities and communication - and the results are analyzed. PMID:23175410

Hollanda, Eliane; de Siqueira, Sandra Aparecida Venâncio; de Andrade, Gabriela Rieveres Borges; Molinaro, Alex; Vaitsman, Jeni

2012-12-01

441

Foreword  

NASA Astrophysics Data System (ADS)

The workshop ``Low-mass stars and brown dwarfs: IMF, accretion and activity'' was held in Volterra (PI, Italy)- on October 17--20, 2004. About sixty participants reviewed and discussed recent developments in the field of formation and early evolution of low mass stellar and substellar objects. The meeting and format of the meeting were designed to stimulate discussion on new and exciting results. The workshop was organised as part of a coordinated italian project designed to exploit the various expertise of a network of italian groups working on formation and early evolution of low-mass objects. The project, coordinated by Antonella Natta in Florence and with Co-Is in Cagliari (Luca Moscadelli), Napoli (Alberto Angelo Vittone), Palermo (Salvatore Sciortino), and Torino (Silvano Massaglia and Gianluigi Bodo), started in 2002 with the approval of the italian Ministery of University, Instruction and Research. At the Volterra workshop, several outstanding results achieved in the last two years by these groups were presented and discussed together with leading international experts. The city of Volterra and the ``Centro studi Santa Maria Maddalena'' of the Cassa di Risparmio di Volterra have been a wonderful setting for a lively and exciting meeting. Special thanks are due to the INAF-Osservatorio Astrofisico di Arcetri and the Italian MIUR for financial support. The workshop would have not been possible without the collaboration of Emanuela Masini, who, with the help of the Volterra Tourist Office, took care of all the practical aspects of its organization.

442

Vibrational spectra and non linear optical proprieties of L-histidine oxalate: DFT studies.  

PubMed

This paper presents the results of our calculations on the geometric parameters, vibrational spectra and hyperpolarizability of a nonlinear optical material L-histidine oxalate. Due to the lack of sufficiently precise information on geometric structure in literature, theoretical calculations were preceded by re-determination of the crystal X-ray structure. Single crystal of L-histidine oxalate has been growing by slow evaporation of an aqueous solution at room temperature. The compound crystallizes in the non-Centro symmetric space group P2(1)2(1)2(1) of orthorhombic system. The FT-IR and Raman spectra of L-histidine oxalate were recorded and analyzed. The vibrational wave numbers were examined theoretical with the aid of Gaussian98 package of programs using the DFT//B3LYP/6-31G(d) level of theory. The data obtained from vibrational wave number calculations are used to assign vibrational bands obtained in IR and Raman spectroscopy of the studied compound. The geometrical parameters of the title compound are in agreement with the values of similar structures. To investigate microscopic second order non-linear optical NLO behaviour of the examined complex, the electric dipole ?(tot), the polarizability ?(tot) and the hyperpolarizability ?(tot) were computed using DFT//B3LYP/6-31G(d) method. According to our calculation, the title compound exhibits non-zero ?(tot) value revealing microscopic second order NLO behaviour. PMID:21530379

Ben Ahmed, A; Elleuch, N; Feki, H; Abid, Y; Minot, C

2011-08-01

443

Electrically Actuated Antiglare Rear-View Mirror Based on a Shape Memory Alloy Actuator  

NASA Astrophysics Data System (ADS)

This article focuses on the experience of Centro Ricerche FIAT (CRF) regarding the development of shape memory alloy (SMA) actuators, and addressed some new design approaches which have been defined. Specific characteristics of shape memory materials, such as the efficiency of the transformation, have oriented the design of actuators toward occasionally used devices. The antiglare manual mechanism, incorporated in the internal rear-view mirror of a car, fits this new approach well. An antiglare rear-view mirror is a system capable of detecting a glare situation during night-time driving in order to automatically switch the mirror plane so as not to distract the driver. The low forces required, together with the silent, bi-stable movement are suitable for the use of a SMA actuator in this application. In the first part of the paper, the conceptual design is illustrated and a preliminary overview of the working principle is provided together with a series of considerations regarding the kinematics and the layout of electronic sensors in order to realize a fully controlled mechatronic prototype. Before concluding, the description of the realization of a working prototype is presented. The prototype of the EAGLE (Electrically Actuated antiGLare rEar-view mirror) system has provided experimental confirmation that such a device can satisfy fatigue and functional test requirements, thus offering the opportunity to spread the use of SMA devices in the automotive field.

Luchetti, T.; Zanella, A.; Biasiotto, M.; Saccagno, A.

2009-08-01

444

Mineralogical In-situ Investigation of Acid-Sulfate Samples from the Rio Tinto River, Spain, with a Portable XRD/XRF Instrument  

NASA Technical Reports Server (NTRS)

A field campaign was organized in September 2006 by Centro de Astobiologica (Spain) and Washington University (St Louis, USA) for the geological study of the Rio Tinto river bed sediments using a suite of in-situ instruments comprising an ASD reflectance spectrometer, an emission spectrometer, panoramic and close-up color imaging cameras, a life detection system and NASA's CheMin 4 XRD/XRF prototype. The primary objectives of the field campaign were to study the geology of the site and test the potential of the instrument suite in an astrobiological investigation context for future Mars surface robotic missions. The results of the overall campaign will be presented elsewhere. This paper focuses on the results of the XRD/XRF instrument deployment. The specific objectives of the CheMin 4 prototype in Rio Tinto were to 1) characterize the mineralogy of efflorescent salts in their native environments; 2) analyze the mineralogy of salts and oxides from the modern environment to terraces formed earlier as part of the Rio Tinto evaporative system; and 3) map the transition from hematite-dominated terraces to the mixed goethite/salt-bearing terraces where biosignatures are best preserved.

Sarrazin, P.; Ming, D. W.; Morris, R. V.; Fernandez-Remolar, D.; Amils, R.; Arvidson, R. E.; Blake, D.; Bish, D. L.

2007-01-01

445

Sterilization of skin allografts by ionizing radiation.  

PubMed

The skin has a fundamental role in the viability of human body. In the case of extensive wounds, skin allografts provide an alternative to cover temporarily the damaged areas. After donor screening and preservation in glycerol 85%, the skin can be stored in a Skin Bank. Glycerol at this concentration has a bacteriostatic effect after certain time of preservation. On the other hand, skin sterilization by ionizing radiation may reduce the quarentine period for transplantation in patients. The objective of this work was to evaluate allograft sterilization using two sources of ionizing radiation. Through the analysis of stress-strain, it was intended to verify possible effects of the radiation on the structure of preserved grafts. Three groups of skin samples were selected. The first group was maintained in the initial conditions, not irradiated. The second was exposed to cobalt-60, while the third one was irradiated using an Dynamitron Accelerator JOB188 electron beam. The irradiation dose was 25 kGy for both tests. Both irradiation sources, and the Instron Universal Machine used for biomechanical experiments, are installed at the Centro de Tecnologia das Radiações/Instituto de Pesquisas Energéticas e Nucleares (São Paulo, Brazil). According to the preliminary results, biomechanical characteristics of the samples irradiated seem to be maintained with regard to the non irradiated group. PMID:12619979

Bourroul, Selma Cecília; Herson, Marisa Roma; Pino, Eddy; Matho, Monica Beatriz

2002-11-01

446

Identification of irradiated wheat by germination test, DNA comet assay and electron spin resonance  

NASA Astrophysics Data System (ADS)

In several countries, there has been an increase in the use of radiation for food processing thus improving the quality and sanitary conditions, inhibiting pathogenic microorganisms, delaying the natural aging process and so extending product lifetime. The need to develop analytical methods to detect these irradiated products is also increasing. The goal of this research was to identify wheat irradiated using different radiation doses. Seeds were irradiated with a gamma 60Co source (Gammacell 220 GC) in the Centro de Energia Nuclear na Agricultura and the Instituto de Pesquisas Energéticas e Nucleares. Dose rate used were 1.6 and 5.8kGy/h. Applied doses were 0.0, 0.10, 0.25, 0.50, 0.75, 1.0, and 2.0kGy. After irradiation, seeds were analysed over a 6 month period. Three different detection methods were employed to determine how irradiation had modified the samples. Screening methods consisted of a germination test measuring the inhibition of shooting and rooting and analysis of DNA fragmentation. The method of electron spin resonance spectroscopy allowed a better dosimetric evaluation. These techniques make the identification of irradiated wheat with different doses possible.

Barros, Adilson C.; Freund, Maria Teresa L.; Villavicencio, Ana Lúcia C. H.; Delincée, Henry; Arthur, Valter

2002-03-01

447

Self-organization of developing embryo using scale-invariant approach  

PubMed Central

Background Self-organization is a fundamental feature of living organisms at all hierarchical levels from molecule to organ. It has also been documented in developing embryos. Methods In this study, a scale-invariant power law (SIPL) method has been used to study self-organization in developing embryos. The SIPL coefficient was calculated using a centro-axial skew symmetrical matrix (CSSM) generated by entering the components of the Cartesian coordinates; for each component, one CSSM was generated. A basic square matrix (BSM) was constructed and the determinant was calculated in order to estimate the SIPL coefficient. This was applied to developing C. elegans during early stages of embryogenesis. The power law property of the method was evaluated using the straight line and Koch curve and the results were consistent with fractal dimensions (fd). Diffusion-limited aggregation (DLA) was used to validate the SIPL method. Results and conclusion The fractal dimensions of both the straight line and Koch curve showed consistency with the SIPL coefficients, which indicated the power law behavior of the SIPL method. The results showed that the ABp sublineage had a higher SIPL coefficient than EMS, indicating that ABp is more organized than EMS. The fd determined using DLA was higher in ABp than in EMS and its value was consistent with type 1 cluster formation, while that in EMS was consistent with type 2.

2011-01-01

448

Frequencies of Inaudible High-Frequency Sounds Differentially Affect Brain Activity: Positive and Negative Hypersonic Effects  

PubMed Central

The hypersonic effect is a phenomenon in which sounds containing significant quantities of non-stationary high-frequency components (HFCs) above the human audible range (max. 20 kHz) activate the midbrain and diencephalon and evoke various physiological, psychological and behavioral responses. Yet important issues remain unverified, especially the relationship existing between the frequency of HFCs and the emergence of the hypersonic effect. In this study, to investigate the relationship between the hypersonic effect and HFC frequencies, we divided an HFC (above 16 kHz) of recorded gamelan music into 12 band components and applied them to subjects along with an audible component (below 16 kHz) to observe changes in the alpha2 frequency component (10–13 Hz) of spontaneous EEGs measured from centro-parieto-occipital regions (Alpha-2 EEG), which we previously reported as an index of the hypersonic effect. Our results showed reciprocal directional changes in Alpha-2 EEGs depending on the frequency of the HFCs presented with audible low-frequency component (LFC). When an HFC above approximately 32 kHz was applied, Alpha-2 EEG increased significantly compared to when only audible sound was applied (positive hypersonic effect), while, when an HFC below approximately 32 kHz was applied, the Alpha-2 EEG decreased (negative hypersonic effect). These findings suggest that the emergence of the hypersonic effect depends on the frequencies of inaudible HFC.

Fukushima, Ariko; Yagi, Reiko; Kawai, Norie; Honda, Manabu; Nishina, Emi; Oohashi, Tsutomu

2014-01-01

449

Brain lateralization of holistic versus analytic processing of emotional facial expressions.  

PubMed

This study investigated the neurocognitive mechanisms underlying the role of the eye and the mouth regions in the recognition of facial happiness, anger, and surprise. To this end, face stimuli were shown in three formats (whole face, upper half visible, and lower half visible) and behavioral categorization, computational modeling, and ERP (event-related potentials) measures were combined. N170 (150-180ms post-stimulus; right hemisphere) and EPN (early posterior negativity; 200-300ms; mainly, right hemisphere) were modulated by expression of whole faces, but not by separate halves. This suggests that expression encoding (N170) and emotional assessment (EPN) require holistic processing, mainly in the right hemisphere. In contrast, the mouth region of happy faces enhanced left temporo-occipital activity (150-180ms), and also the LPC (late positive complex; centro-parietal) activity (350-450ms) earlier than the angry eyes (450-600ms) or other face regions. Relatedly, computational modeling revealed that the mouth region of happy faces was also visually salient by 150ms following stimulus onset. This suggests that analytical or part-based processing of the salient smile occurs early (150-180ms) and lateralized (left), and is subsequently used as a shortcut to identify the expression of happiness (350-450ms). This would account for the happy face advantage in behavioral recognition tasks when the smile is visible. PMID:24495810

Calvo, Manuel G; Beltrán, David

2014-05-15

450

Determination of nitrogen in metallic phases using the 14N(d, p/?)15N nuclear reaction  

NASA Astrophysics Data System (ADS)

Analysis of nitrogen in metallic materials using X-ray spectrometry (EDS, PIXE) is subjected to large errors due to two factors: the low nitrogen contents in the steels (usually below 0.3 wt.%) and the presence of interfering L-lines of the main metallic components (Fe, Cr, Ni, … ). These factors prevent the use of SEM, TEM, micro-PIXE and other microanalytical techniques for the quantitative determination of nitrogen in metallic phases, non-metallic inclusions, precipitates, etc. In this case the deuteron induced gamma-ray emission (DIGE or d-PIGE) is known to be a very suitable method. In this work we describe the methodology for the use of the 14N(d, p?) 15N nuclear reaction at a deuteron energy of 1.4 MeV to measure low nitrogen levels in steel, using both macro and microbeam analysis. DIGE experiments were performed in the universal chamber and in the scanning nuclear microprobe at the Centro Nacional de Aceleradores in Seville, using steel standards with nitrogen contents ranging between 0.008 and 0.35 wt.%. These results give a value for the detection limits for nitrogen in the steels of 0.001 wt.% for the macrobeam and 0.04 wt.%. for the microbeam. Results are applied, in combination with d-PIXE (or DIXE), RBS and electron imaging to the determination of the nitrogen partitioning ratio between ?-Fe and ?-Fe in an austenitic-ferritic duplex stainless steel.

Ager, F. J.; Elmrabet, S.; Paúl, A.; Cea-Naharro, Á.; Ynsa, M. D.; Respaldiza, M. A.; Odriozola, J. A.

2002-04-01

451

Components of particulate air pollution and emergency department visits in Chile.  

PubMed

The objective of the present study was to determine the association between several elements of particulates and Emergency Department (ED) visits in a general population sample. Daily time-series analyses tested the association between daily ED visit and air pollutants and components of particulates measured in Santiago Centro, a municipality, which includes downtown Santiago during the period from 2001 to 2006. The strongest individual effect was seen for elemental carbon. A 4.76 microg/m3 increase was associated with a relative risk (RR) of 1.12 (95% confidence interval [CI] = 1.10-1.14) increase in total ED visits, and a RR of 1.18 (95% CI = 1.16-1.21) for respiratory ED visit. Using factor analysis, the authors determined that traffic combustion-related particulates were significantly associated with ED visits. Among all the sources identified, traffic combustion-related particulates had the strongest association with ED visits. A factor indicating soil-sourced particles had a weaker but statistically significant observed morbidity effect. Of the many components of particulate air pollution, those from motor vehicle exhaust had the greatest observed effect on morbidity. PMID:19864216

Cakmak, Sabit; Dales, Robert E; Gultekin, Timur; Vidal, Claudia Blanco; Farnendaz, Marcelo; Rubio, Maria Angelica; Oyola, Pedro

2009-01-01

452

COROT and OMC archives  

NASA Astrophysics Data System (ADS)

COROT (COnvection, ROtation and Transits) is a satellite launched in December 2006 with two principal objectives: the study of stellar interiors using asteroseismology techniques, and the discovery of extrasolar planets using the transit method. The Data Archive Unit of the Centro de Astrobiología (CAB) is one of the data centers from where it is possible to access COROT public data (http://sdc.cab.inta-csic.es/corotfa). In this paper the main functions of the COROT public archive at CAB are described.The archive has been developed in the framework of the Spanish Virtual Observatory following the standards defined by the International Virtual Observatories Alliance (IVOA, http://www.ivoa.net). At present it contains over ninety thousand light curves with an unprecedented photometric accuracy and time resolution. Also, the OMC (Optical Monitoring Camera, an instrument onboard the INTEGRAL satellite) archive (http://sdc.cab.inta-csic.es/omc) is in operation since 2003 and contains more than sixty thousand light curves of high photometric quality.We describe here the main functionalities of both systems.

Velasco Trasmonte, A.; Gutiérrez Sánchez, R.; Solano Márquez, E.

2011-11-01

453

Epileptic seizure predictors based on computational intelligence techniques: a comparative study with 278 patients.  

PubMed

The ability of computational intelligence methods to predict epileptic seizures is evaluated in long-term EEG recordings of 278 patients suffering from pharmaco-resistant partial epilepsy, also known as refractory epilepsy. This extensive study in seizure prediction considers the 278 patients from the European Epilepsy Database, collected in three epilepsy centres: Hôpital Pitié-là-Salpêtrière, Paris, France; Universitätsklinikum Freiburg, Germany; Centro Hospitalar e Universitário de Coimbra, Portugal. For a considerable number of patients it was possible to find a patient specific predictor with an acceptable performance, as for example predictors that anticipate at least half of the seizures with a rate of false alarms of no more than 1 in 6 h (0.15 h?¹). We observed that the epileptic focus localization, data sampling frequency, testing duration, number of seizures in testing, type of machine learning, and preictal time influence significantly the prediction performance. The results allow to face optimistically the feasibility of a patient specific prospective alarming system, based on machine learning techniques by considering the combination of several univariate (single-channel) electroencephalogram features. We envisage that this work will serve as benchmark data that will be of valuable importance for future studies based on the European Epilepsy Database. PMID:24657096

Alexandre Teixeira, César; Direito, Bruno; Bandarabadi, Mojtaba; Le Van Quyen, Michel; Valderrama, Mario; Schelter, Bjoern; Schulze-Bonhage, Andreas; Navarro, Vincent; Sales, Francisco; Dourado, António

2014-05-01

454

Carrier screening for inherited haemoglobin disorders among secondary school students and young adults in Latium, Italy.  

PubMed

To reduce the incidence of ?-thalassaemia major and other severe haemoglobin-related disorders by the early identification of healthy carriers, the Centro Studi Microcitemie Roma has been organising since 1975 a prevention programme in Latium, an Italian central region. This programme entails two different types of carrier screening on a voluntary basis: a universal screening offered to secondary school students and a screening offered to young adults. In 36 years of scholastic screening (from 1975 until 2011), 1,466,100 students have been examined and 26,786 (1.8 %) carriers of non-? thalassaemia have been identified. In the extra-scholastic screening, 388,690 adult subjects (including the carriers' relatives) have been examined and a total of 38,457 (9.9 %) carriers of non-? thalassaemia have been detected. These results demonstrate that the precocious identification of healthy carriers allowed the identification of at-risk couples and reduced to zero the birth of affected babies in the Latium native population. This programme does not involve huge resources and is relatively inexpensive and, as such, it is essential to be offered to the total Latium scholastic and extra-scholastic population, which is epidemiologically changing due to migratory fluxes from countries in which haemoglobin disorders are common. PMID:24163007

Amato, Antonio; Cappabianca, Maria Pia; Lerone, Maria; Colosimo, Alessia; Grisanti, Paola; Ponzini, Donatella; Di Biagio, Paola; Perri, Maria; Gianni, Debora; Rinaldi, Silvana; Piscitelli, Roberta

2014-07-01

455

Helical tomotherapy in children and adolescents: dosimetric comparisons, opportunities and issues.  

PubMed

Helical Tomotherapy (HT) is a highly conformal image-guided radiation technique, introduced into clinical routine in 2006 at the Centro di Riferimento Oncologico Aviano (Italy). With this new technology, intensity-modulated radiotherapy (IMRT) is delivered using a helicoidal method. Here we present our dosimetric experiences using HT in 100 children, adolescents and young adults treated from May 2006 to February 2011. The median age of the patients was 13 years (range 1-24). The most common treated site was the central nervous system (50; of these, 24 were craniospinal irradiations), followed by thorax (22), head and neck (10), abdomen and pelvis (11), and limbs (7). The use of HT was calculated in accordance to the target dose conformation, the target size and shape, the dose to critical organs adjacent to the target, simultaneous treatment of multiple targets, and re-irradiation. HT has demonstrated to improve target volume dose homogeneity and the sparing of critical structures, when compared to 3D Linac-based radiotherapy (RT). In standard cases this technique represented a comparable alternative to IMRT delivered with conventional linear accelerator. In certain cases (e.g., craniospinal and pleural treatments) only HT generated adequate treatment plans with good target volume coverage. However, the gain in target conformality should be balanced with the spread of low-doses to distant areas. This remains an open issue for the potential risk of secondary malignancies (SMNs) and longer follow-up is mandatory. PMID:24213120

Mascarin, Maurizio; Giugliano, Francesca Maria; Coassin, Elisa; Drigo, Annalisa; Chiovati, Paola; Dassie, Andrea; Franchin, Giovanni; Minatel, Emilio; Trovò, Mauro Gaetano

2011-01-01

456

Effects of Pre-Encoding Stress on Brain Correlates Associated with the Long-Term Memory for Emotional Scenes  

PubMed Central

Recent animal and human research indicates that stress around the time of encoding enhances long-term memory for emotionally arousing events but neural evidence remains unclear. In the present study we used the ERP old/new effect to investigate brain dynamics underlying the long-term effects of acute pre-encoding stress on memory for emotional and neutral scenes. Participants were exposed either to the Socially Evaluated Cold Pressure Test (SECPT) or a warm water control procedure before viewing 30 unpleasant, 30 neutral and 30 pleasant pictures. Two weeks after encoding, recognition memory was tested using 90 old and 90 new pictures. Emotional pictures were better recognized than neutral pictures in both groups and related to an enhanced centro-parietal ERP old/new difference (400–800 ms) during recognition, which suggests better recollection. Most interestingly, pre-encoding stress exposure specifically increased the ERP old/new-effect for emotional (unpleasant) pictures, but not for neutral pictures. These enhanced ERP/old new differences for emotional (unpleasant) scenes were particularly pronounced for those participants who reported high levels of stress during the SECPT. The results suggest that acute pre-encoding stress specifically strengthens brain signals of emotional memories, substantiating a facilitating role of stress on memory for emotional scenes.

Wirkner, Janine; Weymar, Mathias; Low, Andreas; Hamm, Alfons O.

2013-01-01

457

Las Migraciones en el Proceso de Integracion de las Americas: Seminario Internacional (Migration in the Integration Process in the Americas: International Seminar). Conference report.  

PubMed

This conference report of the Centro de Estudios Migratorios Latinoamericanos and the Center for Migration Studies pertains to meetings held in August 1992. Summary information on migration movements in Latin America is presented by region and subject. The topic of integration in the Americas was presented by Mr. Lelio Marmora. Other topics and presenters include the new Colombian Migration Policy (Mr. Carlos Adolfo Arenas), the integration policies in Central America (Mr. Pilar Norza of Costa Rica, Raimundo Alvarado of El Salvador, and Luis Armando Gusman of Nicaragua), the Andean Pact agreements (representatives of each country), US immigration policy (Charles B. Keely), the Mexican integration with Latin America and immigration to the US (Jorge Bustamante), migration to Bolivia and Argentina and Chile, and transnationalism in the Caribbean (Professor Andre Corten). Migration policy needs to be tailored specifically to the situation in Latin America, and greater attention needs to be devoted to labor migrants' rights and working conditions. There are still fundamental differences among countries in policies regarding the free circulation of persons across borders. There is a division among those who support migration and those who are realists. National sovereignty issues are solvable because of a common national past and a relatively homogenous population. Another opinion is that Latin America is more diverse than commonly recognized. Capital is protected more in international agreements than is migrant labor. Regional integration for the US does mean immigration from Mexico. The US sees Mexican migration as a policy problem, and Mexico sees migration as a labor opportunity. PMID:12346329

Berglund, S

1993-01-01

458

The Internal tide at San Esteban sill in the Gulf of California  

NASA Astrophysics Data System (ADS)

Results are discussed from a short survey in the Gulf of California to evaluate the parameters of internal tidal waves generated at San Esteban sill and to test new technology and equipment designed to make these measurements. Aboard the BIP XII oceanographic research vessel of the Centro de Investigaciones Biológicas del Noroeste de Guaymas, Sonora, different measurements of internal waves were performed using: a) a tow-yo CTD SBE-19plus; 2) two temperature and pressure sensors arrays and an ADCP, towed one behind the other with a new towing design; and c) an array of 14 HOBO thermographs, distributed at different depths. Data show that the semidiurnal barotropic tide at San Esteban sill causes a hydraulic jump and a non linear internal tide (with a steep leading slope). This wave propagates to the North, during ebb, and to the South, during flow of the barotropic wave. The internal tide in the Gulf of California generates significant variations of temperature and salinity as deep as 150 m depth. At the leading edge of this wave a group of 8-10 solitons is regularly found, with maximum amplitudes above 50 m, weave length of 1250 to 1500 m, and phase velocities from 1.2 to 1.4 m/s. These short non-linear wave groups capture and disperse the energy of the internal “mother wave”, generating turbulence, vertical and horizontal mixing, and diffusion and dispersion of nutrients and plankton.

Filonov, A.

2009-12-01

459

SULF1/SULF2 splice variants differentially regulate pancreatic tumour growth progression.  

PubMed

This study highlights the highly dynamic nature of SULF1/SULF2 splice variants in different human pancreatic cancers that regulate the activities of multiple cell signalling pathways in development and disease. Most pancreatic tumours expressed variable levels of both SULF1 and SULF2 variants including some expression during inflammation and pancreatitis. Many ductal and centro-acinar cell-derived pancreatic tumours are known to evolve into lethal pancreatic ductal adenocarcinomas but the present study also detected different stages of such tumour progression in the same tissue biopsies of not only acinar cell origin but also islet cell-derived cancers. The examination of caerulein-induced pancreatic injury and tumorigenesis in a Kras-driven mouse model confirmed the activation and gradual increase of SULF1/SULF2 variants during pancreatitis and tumorigenesis but with reduced levels in Stat3 conditional knockout mice with reduced inflammation. The significance of differential spatial and temporal patterns of specific SULF1/SULF2 splice variant expression during cancer growth became further apparent from their differential stimulatory or inhibitory effects on growth factor activities, tumour growth and angiogenesis not only during in vitro but also in vivo growth thus providing possible novel therapeutic targets. PMID:24726914

Gill, Roop M S; Michael, Andreas; Westley, Leah; Kocher, Hemant M; Murphy, Joshua I; Dhoot, Gurtej K

2014-06-10

460

Partial seizures with affective semiology versus pavor nocturnus.  

PubMed

Sudden nocturnal events with an affective semiology may have various etiologies, such as nocturnal panic attacks, nightmares, pavor nocturnus and/or different types of focal epileptic seizures, particularly in children. We describe the case of a normally developed boy who, at the age of two years, experienced nocturnal paroxysmal events that occurred about one hour after falling asleep and lasted up to 15 minutes. The clinical picture was characterized by sudden arousal, fear, inconsolable crying and an apparently voluntary search for his mother. The state of consciousness was basically maintained, and the inter-ictal EEG pattern showed independent bilateral centro-temporal spikes and spike-and-wave complexes. The child had a family history of benign partial epilepsy of childhood with rolandic spikes, and the paroxysmal events remitted after valproic acid treatment. This case report highlights the difficulties in the differential diagnosis of panic attacks, nightmares, pavor nocturnus and focal nocturnal epileptic seizures, especially those arising from the temporal and frontal lobes. PMID:20167565

Cornaggia, Cesare Maria; Beghi, Massimiliano; Giovannini, Simona; Boni, Antonella; Gobbi, Giuseppe

2010-03-01

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